diff --git a/apps/api/drizzle-sqlite-legacy/meta/0000_snapshot.json b/apps/api/drizzle-sqlite-legacy/meta/0000_snapshot.json
index 54abc0aa..88f526a9 100644
--- a/apps/api/drizzle-sqlite-legacy/meta/0000_snapshot.json
+++ b/apps/api/drizzle-sqlite-legacy/meta/0000_snapshot.json
@@ -1,54 +1,67 @@
 {
-  "version": "6",
-  "dialect": "sqlite",
-  "id": "c7909605-aabf-4832-8ef8-9390c0f7c99a",
-  "prevId": "00000000-0000-0000-0000-000000000000",
+  "id": "b83e1f2a-9c4d-4e7b-a1f3-8d2c6b5a4e90",
+  "prevId": "47a9d637-64e3-4cca-a916-cf42ea63b335",
+  "version": "7",
+  "dialect": "postgresql",
   "tables": {
-    "api_keys": {
+    "public.api_keys": {
       "name": "api_keys",
+      "schema": "",
       "columns": {
         "id": {
           "name": "id",
           "type": "text",
           "primaryKey": true,
-          "notNull": true,
-          "autoincrement": false
+          "notNull": true
         },
         "user_id": {
           "name": "user_id",
           "type": "text",
           "primaryKey": false,
-          "notNull": true,
-          "autoincrement": false
+          "notNull": true
         },
         "key_hash": {
           "name": "key_hash",
           "type": "text",
           "primaryKey": false,
-          "notNull": true,
-          "autoincrement": false
+          "notNull": true
+        },
+        "key_prefix": {
+          "name": "key_prefix",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false
         },
         "name": {
           "name": "name",
           "type": "text",
           "primaryKey": false,
           "notNull": true,
-          "autoincrement": false,
           "default": "'Default API Key'"
         },
+        "permissions": {
+          "name": "permissions",
+          "type": "jsonb",
+          "primaryKey": false,
+          "notNull": false
+        },
         "created_at": {
           "name": "created_at",
-          "type": "integer",
+          "type": "timestamp with time zone",
           "primaryKey": false,
-          "notNull": true,
-          "autoincrement": false
+          "notNull": true
         },
         "last_used_at": {
           "name": "last_used_at",
-          "type": "integer",
+          "type": "timestamp with time zone",
           "primaryKey": false,
-          "notNull": false,
-          "autoincrement": false
+          "notNull": false
+        },
+        "expires_at": {
+          "name": "expires_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": false
         }
       },
       "indexes": {},
@@ -65,120 +78,423 @@
       },
       "compositePrimaryKeys": {},
       "uniqueConstraints": {},
-      "checkConstraints": {}
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
     },
-    "jobs": {
-      "name": "jobs",
+    "public.audit_log": {
+      "name": "audit_log",
+      "schema": "",
       "columns": {
         "id": {
           "name": "id",
           "type": "text",
           "primaryKey": true,
-          "notNull": true,
-          "autoincrement": false
+          "notNull": true
         },
-        "type": {
-          "name": "type",
+        "actor_id": {
+          "name": "actor_id",
           "type": "text",
           "primaryKey": false,
-          "notNull": true,
-          "autoincrement": false
+          "notNull": false
         },
-        "status": {
-          "name": "status",
+        "actor_username": {
+          "name": "actor_username",
           "type": "text",
           "primaryKey": false,
-          "notNull": true,
-          "autoincrement": false,
-          "default": "'queued'"
+          "notNull": true
         },
-        "progress": {
-          "name": "progress",
-          "type": "real",
-          "primaryKey": false,
-          "notNull": true,
-          "autoincrement": false,
-          "default": 0
-        },
-        "input_files": {
-          "name": "input_files",
+        "action": {
+          "name": "action",
           "type": "text",
           "primaryKey": false,
-          "notNull": true,
-          "autoincrement": false
+          "notNull": true
         },
-        "output_path": {
-          "name": "output_path",
+        "target_type": {
+          "name": "target_type",
           "type": "text",
           "primaryKey": false,
-          "notNull": false,
-          "autoincrement": false
+          "notNull": false
         },
-        "settings": {
-          "name": "settings",
+        "target_id": {
+          "name": "target_id",
           "type": "text",
           "primaryKey": false,
-          "notNull": false,
-          "autoincrement": false
+          "notNull": false
         },
-        "error": {
-          "name": "error",
+        "details": {
+          "name": "details",
+          "type": "jsonb",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "ip_address": {
+          "name": "ip_address",
           "type": "text",
           "primaryKey": false,
-          "notNull": false,
-          "autoincrement": false
+          "notNull": false
         },
         "created_at": {
           "name": "created_at",
-          "type": "integer",
+          "type": "timestamp with time zone",
           "primaryKey": false,
-          "notNull": true,
-          "autoincrement": false
-        },
-        "completed_at": {
-          "name": "completed_at",
-          "type": "integer",
-          "primaryKey": false,
-          "notNull": false,
-          "autoincrement": false
+          "notNull": true
         }
       },
       "indexes": {},
-      "foreignKeys": {},
+      "foreignKeys": {
+        "audit_log_actor_id_users_id_fk": {
+          "name": "audit_log_actor_id_users_id_fk",
+          "tableFrom": "audit_log",
+          "tableTo": "users",
+          "columnsFrom": ["actor_id"],
+          "columnsTo": ["id"],
+          "onDelete": "set null",
+          "onUpdate": "no action"
+        }
+      },
       "compositePrimaryKeys": {},
       "uniqueConstraints": {},
-      "checkConstraints": {}
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
     },
-    "sessions": {
-      "name": "sessions",
+    "public.jobs": {
+      "name": "jobs",
+      "schema": "",
       "columns": {
         "id": {
           "name": "id",
           "type": "text",
           "primaryKey": true,
-          "notNull": true,
-          "autoincrement": false
+          "notNull": true
         },
         "user_id": {
           "name": "user_id",
           "type": "text",
           "primaryKey": false,
-          "notNull": true,
-          "autoincrement": false
+          "notNull": false
         },
-        "expires_at": {
-          "name": "expires_at",
+        "tool_id": {
+          "name": "tool_id",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "pool": {
+          "name": "pool",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "type": {
+          "name": "type",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "status": {
+          "name": "status",
+          "type": "job_status",
+          "typeSchema": "public",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "'queued'"
+        },
+        "attempts": {
+          "name": "attempts",
           "type": "integer",
           "primaryKey": false,
           "notNull": true,
-          "autoincrement": false
+          "default": 0
+        },
+        "progress": {
+          "name": "progress",
+          "type": "jsonb",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "input_refs": {
+          "name": "input_refs",
+          "type": "jsonb",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "output_refs": {
+          "name": "output_refs",
+          "type": "jsonb",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "settings": {
+          "name": "settings",
+          "type": "jsonb",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "error": {
+          "name": "error",
+          "type": "jsonb",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "bytes_in": {
+          "name": "bytes_in",
+          "type": "bigint",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "bytes_out": {
+          "name": "bytes_out",
+          "type": "bigint",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "duration_ms": {
+          "name": "duration_ms",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": false
         },
         "created_at": {
           "name": "created_at",
-          "type": "integer",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "started_at": {
+          "name": "started_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "completed_at": {
+          "name": "completed_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": false
+        }
+      },
+      "indexes": {
+        "jobs_created_at_idx": {
+          "name": "jobs_created_at_idx",
+          "columns": [
+            {
+              "expression": "created_at",
+              "isExpression": false,
+              "asc": true,
+              "nulls": "last"
+            }
+          ],
+          "isUnique": false,
+          "concurrently": false,
+          "method": "btree",
+          "with": {}
+        },
+        "jobs_status_idx": {
+          "name": "jobs_status_idx",
+          "columns": [
+            {
+              "expression": "status",
+              "isExpression": false,
+              "asc": true,
+              "nulls": "last"
+            }
+          ],
+          "isUnique": false,
+          "concurrently": false,
+          "method": "btree",
+          "with": {}
+        }
+      },
+      "foreignKeys": {
+        "jobs_user_id_users_id_fk": {
+          "name": "jobs_user_id_users_id_fk",
+          "tableFrom": "jobs",
+          "tableTo": "users",
+          "columnsFrom": ["user_id"],
+          "columnsTo": ["id"],
+          "onDelete": "set null",
+          "onUpdate": "no action"
+        }
+      },
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {},
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
+    },
+    "public.pipelines": {
+      "name": "pipelines",
+      "schema": "",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "text",
+          "primaryKey": true,
+          "notNull": true
+        },
+        "user_id": {
+          "name": "user_id",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "name": {
+          "name": "name",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "description": {
+          "name": "description",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "steps": {
+          "name": "steps",
+          "type": "jsonb",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": true
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {
+        "pipelines_user_id_users_id_fk": {
+          "name": "pipelines_user_id_users_id_fk",
+          "tableFrom": "pipelines",
+          "tableTo": "users",
+          "columnsFrom": ["user_id"],
+          "columnsTo": ["id"],
+          "onDelete": "cascade",
+          "onUpdate": "no action"
+        }
+      },
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {},
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
+    },
+    "public.roles": {
+      "name": "roles",
+      "schema": "",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "text",
+          "primaryKey": true,
+          "notNull": true
+        },
+        "name": {
+          "name": "name",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "description": {
+          "name": "description",
+          "type": "text",
           "primaryKey": false,
           "notNull": true,
-          "autoincrement": false
+          "default": "''"
+        },
+        "permissions": {
+          "name": "permissions",
+          "type": "jsonb",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "is_builtin": {
+          "name": "is_builtin",
+          "type": "boolean",
+          "primaryKey": false,
+          "notNull": true,
+          "default": false
+        },
+        "created_by": {
+          "name": "created_by",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "updated_at": {
+          "name": "updated_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": true
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {
+        "roles_created_by_users_id_fk": {
+          "name": "roles_created_by_users_id_fk",
+          "tableFrom": "roles",
+          "tableTo": "users",
+          "columnsFrom": ["created_by"],
+          "columnsTo": ["id"],
+          "onDelete": "set null",
+          "onUpdate": "no action"
+        }
+      },
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {
+        "roles_name_unique": {
+          "name": "roles_name_unique",
+          "nullsNotDistinct": false,
+          "columns": ["name"]
+        }
+      },
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
+    },
+    "public.sessions": {
+      "name": "sessions",
+      "schema": "",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "text",
+          "primaryKey": true,
+          "notNull": true
+        },
+        "user_id": {
+          "name": "user_id",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "expires_at": {
+          "name": "expires_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "id_token": {
+          "name": "id_token",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": true
         }
       },
       "indexes": {},
@@ -195,115 +511,297 @@
       },
       "compositePrimaryKeys": {},
       "uniqueConstraints": {},
-      "checkConstraints": {}
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
     },
-    "settings": {
+    "public.settings": {
       "name": "settings",
+      "schema": "",
       "columns": {
         "key": {
           "name": "key",
           "type": "text",
           "primaryKey": true,
-          "notNull": true,
-          "autoincrement": false
+          "notNull": true
         },
         "value": {
           "name": "value",
           "type": "text",
           "primaryKey": false,
-          "notNull": true,
-          "autoincrement": false
+          "notNull": true
         },
         "updated_at": {
           "name": "updated_at",
-          "type": "integer",
+          "type": "timestamp with time zone",
           "primaryKey": false,
-          "notNull": true,
-          "autoincrement": false
+          "notNull": true
         }
       },
       "indexes": {},
       "foreignKeys": {},
       "compositePrimaryKeys": {},
       "uniqueConstraints": {},
-      "checkConstraints": {}
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
     },
-    "users": {
-      "name": "users",
+    "public.teams": {
+      "name": "teams",
+      "schema": "",
       "columns": {
         "id": {
           "name": "id",
           "type": "text",
           "primaryKey": true,
+          "notNull": true
+        },
+        "name": {
+          "name": "name",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": true
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {},
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {
+        "teams_name_unique": {
+          "name": "teams_name_unique",
+          "nullsNotDistinct": false,
+          "columns": ["name"]
+        }
+      },
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
+    },
+    "public.user_files": {
+      "name": "user_files",
+      "schema": "",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "text",
+          "primaryKey": true,
+          "notNull": true
+        },
+        "user_id": {
+          "name": "user_id",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "original_name": {
+          "name": "original_name",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "stored_name": {
+          "name": "stored_name",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "mime_type": {
+          "name": "mime_type",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "size": {
+          "name": "size",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "width": {
+          "name": "width",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "height": {
+          "name": "height",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "version": {
+          "name": "version",
+          "type": "integer",
+          "primaryKey": false,
           "notNull": true,
-          "autoincrement": false
+          "default": 1
+        },
+        "parent_id": {
+          "name": "parent_id",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "tool_chain": {
+          "name": "tool_chain",
+          "type": "jsonb",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": true
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {
+        "user_files_user_id_users_id_fk": {
+          "name": "user_files_user_id_users_id_fk",
+          "tableFrom": "user_files",
+          "tableTo": "users",
+          "columnsFrom": ["user_id"],
+          "columnsTo": ["id"],
+          "onDelete": "cascade",
+          "onUpdate": "no action"
+        }
+      },
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {},
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
+    },
+    "public.users": {
+      "name": "users",
+      "schema": "",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "text",
+          "primaryKey": true,
+          "notNull": true
         },
         "username": {
           "name": "username",
           "type": "text",
           "primaryKey": false,
-          "notNull": true,
-          "autoincrement": false
+          "notNull": true
         },
         "password_hash": {
           "name": "password_hash",
           "type": "text",
           "primaryKey": false,
-          "notNull": true,
-          "autoincrement": false
+          "notNull": false
         },
         "role": {
           "name": "role",
           "type": "text",
           "primaryKey": false,
           "notNull": true,
-          "autoincrement": false,
           "default": "'user'"
         },
+        "team": {
+          "name": "team",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "'Default'"
+        },
         "must_change_password": {
           "name": "must_change_password",
-          "type": "integer",
+          "type": "boolean",
           "primaryKey": false,
           "notNull": true,
-          "autoincrement": false,
           "default": true
         },
+        "auth_provider": {
+          "name": "auth_provider",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "'local'"
+        },
+        "external_id": {
+          "name": "external_id",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "email": {
+          "name": "email",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false
+        },
         "created_at": {
           "name": "created_at",
-          "type": "integer",
+          "type": "timestamp with time zone",
           "primaryKey": false,
-          "notNull": true,
-          "autoincrement": false
+          "notNull": true
         },
         "updated_at": {
           "name": "updated_at",
-          "type": "integer",
+          "type": "timestamp with time zone",
           "primaryKey": false,
-          "notNull": true,
-          "autoincrement": false
-        }
-      },
-      "indexes": {
-        "users_username_unique": {
-          "name": "users_username_unique",
-          "columns": ["username"],
-          "isUnique": true
+          "notNull": true
+        },
+        "analytics_enabled": {
+          "name": "analytics_enabled",
+          "type": "boolean",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "analytics_consent_shown_at": {
+          "name": "analytics_consent_shown_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "analytics_consent_remind_at": {
+          "name": "analytics_consent_remind_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": false
         }
       },
+      "indexes": {},
       "foreignKeys": {},
       "compositePrimaryKeys": {},
-      "uniqueConstraints": {},
-      "checkConstraints": {}
+      "uniqueConstraints": {
+        "users_username_unique": {
+          "name": "users_username_unique",
+          "nullsNotDistinct": false,
+          "columns": ["username"]
+        }
+      },
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
     }
   },
-  "views": {},
-  "enums": {},
-  "_meta": {
-    "schemas": {},
-    "tables": {},
-    "columns": {}
+  "enums": {
+    "public.job_status": {
+      "name": "job_status",
+      "schema": "public",
+      "values": ["queued", "processing", "completed", "failed", "canceled"]
+    }
   },
-  "internal": {
-    "indexes": {}
+  "schemas": {},
+  "sequences": {},
+  "roles": {},
+  "policies": {},
+  "views": {},
+  "_meta": {
+    "columns": {},
+    "schemas": {},
+    "tables": {}
   }
 }
diff --git a/apps/api/drizzle-sqlite-legacy/meta/0001_snapshot.json b/apps/api/drizzle-sqlite-legacy/meta/0001_snapshot.json
index 88f526a9..6bf86838 100644
--- a/apps/api/drizzle-sqlite-legacy/meta/0001_snapshot.json
+++ b/apps/api/drizzle-sqlite-legacy/meta/0001_snapshot.json
@@ -1,67 +1,54 @@
 {
-  "id": "b83e1f2a-9c4d-4e7b-a1f3-8d2c6b5a4e90",
-  "prevId": "47a9d637-64e3-4cca-a916-cf42ea63b335",
-  "version": "7",
-  "dialect": "postgresql",
+  "version": "6",
+  "dialect": "sqlite",
+  "id": "91a14a95-bbcb-46ef-abe3-6d2f6fbc8458",
+  "prevId": "c7909605-aabf-4832-8ef8-9390c0f7c99a",
   "tables": {
-    "public.api_keys": {
+    "api_keys": {
       "name": "api_keys",
-      "schema": "",
       "columns": {
         "id": {
           "name": "id",
           "type": "text",
           "primaryKey": true,
-          "notNull": true
+          "notNull": true,
+          "autoincrement": false
         },
         "user_id": {
           "name": "user_id",
           "type": "text",
           "primaryKey": false,
-          "notNull": true
+          "notNull": true,
+          "autoincrement": false
         },
         "key_hash": {
           "name": "key_hash",
           "type": "text",
           "primaryKey": false,
-          "notNull": true
-        },
-        "key_prefix": {
-          "name": "key_prefix",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": false
+          "notNull": true,
+          "autoincrement": false
         },
         "name": {
           "name": "name",
           "type": "text",
           "primaryKey": false,
           "notNull": true,
+          "autoincrement": false,
           "default": "'Default API Key'"
         },
-        "permissions": {
-          "name": "permissions",
-          "type": "jsonb",
-          "primaryKey": false,
-          "notNull": false
-        },
         "created_at": {
           "name": "created_at",
-          "type": "timestamp with time zone",
+          "type": "integer",
           "primaryKey": false,
-          "notNull": true
+          "notNull": true,
+          "autoincrement": false
         },
         "last_used_at": {
           "name": "last_used_at",
-          "type": "timestamp with time zone",
+          "type": "integer",
           "primaryKey": false,
-          "notNull": false
-        },
-        "expires_at": {
-          "name": "expires_at",
-          "type": "timestamp with time zone",
-          "primaryKey": false,
-          "notNull": false
+          "notNull": false,
+          "autoincrement": false
         }
       },
       "indexes": {},
@@ -78,423 +65,165 @@
       },
       "compositePrimaryKeys": {},
       "uniqueConstraints": {},
-      "policies": {},
-      "checkConstraints": {},
-      "isRLSEnabled": false
+      "checkConstraints": {}
     },
-    "public.audit_log": {
-      "name": "audit_log",
-      "schema": "",
-      "columns": {
-        "id": {
-          "name": "id",
-          "type": "text",
-          "primaryKey": true,
-          "notNull": true
-        },
-        "actor_id": {
-          "name": "actor_id",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": false
-        },
-        "actor_username": {
-          "name": "actor_username",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": true
-        },
-        "action": {
-          "name": "action",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": true
-        },
-        "target_type": {
-          "name": "target_type",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": false
-        },
-        "target_id": {
-          "name": "target_id",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": false
-        },
-        "details": {
-          "name": "details",
-          "type": "jsonb",
-          "primaryKey": false,
-          "notNull": false
-        },
-        "ip_address": {
-          "name": "ip_address",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": false
-        },
-        "created_at": {
-          "name": "created_at",
-          "type": "timestamp with time zone",
-          "primaryKey": false,
-          "notNull": true
-        }
-      },
-      "indexes": {},
-      "foreignKeys": {
-        "audit_log_actor_id_users_id_fk": {
-          "name": "audit_log_actor_id_users_id_fk",
-          "tableFrom": "audit_log",
-          "tableTo": "users",
-          "columnsFrom": ["actor_id"],
-          "columnsTo": ["id"],
-          "onDelete": "set null",
-          "onUpdate": "no action"
-        }
-      },
-      "compositePrimaryKeys": {},
-      "uniqueConstraints": {},
-      "policies": {},
-      "checkConstraints": {},
-      "isRLSEnabled": false
-    },
-    "public.jobs": {
+    "jobs": {
       "name": "jobs",
-      "schema": "",
       "columns": {
         "id": {
           "name": "id",
           "type": "text",
           "primaryKey": true,
-          "notNull": true
-        },
-        "user_id": {
-          "name": "user_id",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": false
-        },
-        "tool_id": {
-          "name": "tool_id",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": false
-        },
-        "pool": {
-          "name": "pool",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": false
+          "notNull": true,
+          "autoincrement": false
         },
         "type": {
           "name": "type",
           "type": "text",
           "primaryKey": false,
-          "notNull": true
+          "notNull": true,
+          "autoincrement": false
         },
         "status": {
           "name": "status",
-          "type": "job_status",
-          "typeSchema": "public",
+          "type": "text",
           "primaryKey": false,
           "notNull": true,
+          "autoincrement": false,
           "default": "'queued'"
         },
-        "attempts": {
-          "name": "attempts",
-          "type": "integer",
-          "primaryKey": false,
-          "notNull": true,
-          "default": 0
-        },
         "progress": {
           "name": "progress",
-          "type": "jsonb",
+          "type": "real",
           "primaryKey": false,
-          "notNull": false
+          "notNull": true,
+          "autoincrement": false,
+          "default": 0
         },
-        "input_refs": {
-          "name": "input_refs",
-          "type": "jsonb",
+        "input_files": {
+          "name": "input_files",
+          "type": "text",
           "primaryKey": false,
-          "notNull": false
+          "notNull": true,
+          "autoincrement": false
         },
-        "output_refs": {
-          "name": "output_refs",
-          "type": "jsonb",
+        "output_path": {
+          "name": "output_path",
+          "type": "text",
           "primaryKey": false,
-          "notNull": false
+          "notNull": false,
+          "autoincrement": false
         },
         "settings": {
           "name": "settings",
-          "type": "jsonb",
+          "type": "text",
           "primaryKey": false,
-          "notNull": false
+          "notNull": false,
+          "autoincrement": false
         },
         "error": {
           "name": "error",
-          "type": "jsonb",
+          "type": "text",
           "primaryKey": false,
-          "notNull": false
-        },
-        "bytes_in": {
-          "name": "bytes_in",
-          "type": "bigint",
-          "primaryKey": false,
-          "notNull": false
-        },
-        "bytes_out": {
-          "name": "bytes_out",
-          "type": "bigint",
-          "primaryKey": false,
-          "notNull": false
-        },
-        "duration_ms": {
-          "name": "duration_ms",
-          "type": "integer",
-          "primaryKey": false,
-          "notNull": false
+          "notNull": false,
+          "autoincrement": false
         },
         "created_at": {
           "name": "created_at",
-          "type": "timestamp with time zone",
+          "type": "integer",
           "primaryKey": false,
-          "notNull": true
-        },
-        "started_at": {
-          "name": "started_at",
-          "type": "timestamp with time zone",
-          "primaryKey": false,
-          "notNull": false
+          "notNull": true,
+          "autoincrement": false
         },
         "completed_at": {
           "name": "completed_at",
-          "type": "timestamp with time zone",
+          "type": "integer",
           "primaryKey": false,
-          "notNull": false
-        }
-      },
-      "indexes": {
-        "jobs_created_at_idx": {
-          "name": "jobs_created_at_idx",
-          "columns": [
-            {
-              "expression": "created_at",
-              "isExpression": false,
-              "asc": true,
-              "nulls": "last"
-            }
-          ],
-          "isUnique": false,
-          "concurrently": false,
-          "method": "btree",
-          "with": {}
-        },
-        "jobs_status_idx": {
-          "name": "jobs_status_idx",
-          "columns": [
-            {
-              "expression": "status",
-              "isExpression": false,
-              "asc": true,
-              "nulls": "last"
-            }
-          ],
-          "isUnique": false,
-          "concurrently": false,
-          "method": "btree",
-          "with": {}
-        }
-      },
-      "foreignKeys": {
-        "jobs_user_id_users_id_fk": {
-          "name": "jobs_user_id_users_id_fk",
-          "tableFrom": "jobs",
-          "tableTo": "users",
-          "columnsFrom": ["user_id"],
-          "columnsTo": ["id"],
-          "onDelete": "set null",
-          "onUpdate": "no action"
+          "notNull": false,
+          "autoincrement": false
         }
       },
+      "indexes": {},
+      "foreignKeys": {},
       "compositePrimaryKeys": {},
       "uniqueConstraints": {},
-      "policies": {},
-      "checkConstraints": {},
-      "isRLSEnabled": false
+      "checkConstraints": {}
     },
-    "public.pipelines": {
+    "pipelines": {
       "name": "pipelines",
-      "schema": "",
       "columns": {
         "id": {
           "name": "id",
           "type": "text",
           "primaryKey": true,
-          "notNull": true
-        },
-        "user_id": {
-          "name": "user_id",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": false
+          "notNull": true,
+          "autoincrement": false
         },
         "name": {
           "name": "name",
           "type": "text",
           "primaryKey": false,
-          "notNull": true
+          "notNull": true,
+          "autoincrement": false
         },
         "description": {
           "name": "description",
           "type": "text",
           "primaryKey": false,
-          "notNull": false
+          "notNull": false,
+          "autoincrement": false
         },
         "steps": {
           "name": "steps",
-          "type": "jsonb",
+          "type": "text",
           "primaryKey": false,
-          "notNull": true
+          "notNull": true,
+          "autoincrement": false
         },
         "created_at": {
           "name": "created_at",
-          "type": "timestamp with time zone",
+          "type": "integer",
           "primaryKey": false,
-          "notNull": true
+          "notNull": true,
+          "autoincrement": false
         }
       },
       "indexes": {},
-      "foreignKeys": {
-        "pipelines_user_id_users_id_fk": {
-          "name": "pipelines_user_id_users_id_fk",
-          "tableFrom": "pipelines",
-          "tableTo": "users",
-          "columnsFrom": ["user_id"],
-          "columnsTo": ["id"],
-          "onDelete": "cascade",
-          "onUpdate": "no action"
-        }
-      },
+      "foreignKeys": {},
       "compositePrimaryKeys": {},
       "uniqueConstraints": {},
-      "policies": {},
-      "checkConstraints": {},
-      "isRLSEnabled": false
+      "checkConstraints": {}
     },
-    "public.roles": {
-      "name": "roles",
-      "schema": "",
-      "columns": {
-        "id": {
-          "name": "id",
-          "type": "text",
-          "primaryKey": true,
-          "notNull": true
-        },
-        "name": {
-          "name": "name",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": true
-        },
-        "description": {
-          "name": "description",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": true,
-          "default": "''"
-        },
-        "permissions": {
-          "name": "permissions",
-          "type": "jsonb",
-          "primaryKey": false,
-          "notNull": true
-        },
-        "is_builtin": {
-          "name": "is_builtin",
-          "type": "boolean",
-          "primaryKey": false,
-          "notNull": true,
-          "default": false
-        },
-        "created_by": {
-          "name": "created_by",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": false
-        },
-        "created_at": {
-          "name": "created_at",
-          "type": "timestamp with time zone",
-          "primaryKey": false,
-          "notNull": true
-        },
-        "updated_at": {
-          "name": "updated_at",
-          "type": "timestamp with time zone",
-          "primaryKey": false,
-          "notNull": true
-        }
-      },
-      "indexes": {},
-      "foreignKeys": {
-        "roles_created_by_users_id_fk": {
-          "name": "roles_created_by_users_id_fk",
-          "tableFrom": "roles",
-          "tableTo": "users",
-          "columnsFrom": ["created_by"],
-          "columnsTo": ["id"],
-          "onDelete": "set null",
-          "onUpdate": "no action"
-        }
-      },
-      "compositePrimaryKeys": {},
-      "uniqueConstraints": {
-        "roles_name_unique": {
-          "name": "roles_name_unique",
-          "nullsNotDistinct": false,
-          "columns": ["name"]
-        }
-      },
-      "policies": {},
-      "checkConstraints": {},
-      "isRLSEnabled": false
-    },
-    "public.sessions": {
+    "sessions": {
       "name": "sessions",
-      "schema": "",
       "columns": {
         "id": {
           "name": "id",
           "type": "text",
           "primaryKey": true,
-          "notNull": true
+          "notNull": true,
+          "autoincrement": false
         },
         "user_id": {
           "name": "user_id",
           "type": "text",
           "primaryKey": false,
-          "notNull": true
+          "notNull": true,
+          "autoincrement": false
         },
         "expires_at": {
           "name": "expires_at",
-          "type": "timestamp with time zone",
+          "type": "integer",
           "primaryKey": false,
-          "notNull": true
-        },
-        "id_token": {
-          "name": "id_token",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": false
+          "notNull": true,
+          "autoincrement": false
         },
         "created_at": {
           "name": "created_at",
-          "type": "timestamp with time zone",
+          "type": "integer",
           "primaryKey": false,
-          "notNull": true
+          "notNull": true,
+          "autoincrement": false
         }
       },
       "indexes": {},
@@ -511,297 +240,115 @@
       },
       "compositePrimaryKeys": {},
       "uniqueConstraints": {},
-      "policies": {},
-      "checkConstraints": {},
-      "isRLSEnabled": false
+      "checkConstraints": {}
     },
-    "public.settings": {
+    "settings": {
       "name": "settings",
-      "schema": "",
       "columns": {
         "key": {
           "name": "key",
           "type": "text",
           "primaryKey": true,
-          "notNull": true
+          "notNull": true,
+          "autoincrement": false
         },
         "value": {
           "name": "value",
           "type": "text",
           "primaryKey": false,
-          "notNull": true
+          "notNull": true,
+          "autoincrement": false
         },
         "updated_at": {
           "name": "updated_at",
-          "type": "timestamp with time zone",
-          "primaryKey": false,
-          "notNull": true
-        }
-      },
-      "indexes": {},
-      "foreignKeys": {},
-      "compositePrimaryKeys": {},
-      "uniqueConstraints": {},
-      "policies": {},
-      "checkConstraints": {},
-      "isRLSEnabled": false
-    },
-    "public.teams": {
-      "name": "teams",
-      "schema": "",
-      "columns": {
-        "id": {
-          "name": "id",
-          "type": "text",
-          "primaryKey": true,
-          "notNull": true
-        },
-        "name": {
-          "name": "name",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": true
-        },
-        "created_at": {
-          "name": "created_at",
-          "type": "timestamp with time zone",
-          "primaryKey": false,
-          "notNull": true
-        }
-      },
-      "indexes": {},
-      "foreignKeys": {},
-      "compositePrimaryKeys": {},
-      "uniqueConstraints": {
-        "teams_name_unique": {
-          "name": "teams_name_unique",
-          "nullsNotDistinct": false,
-          "columns": ["name"]
-        }
-      },
-      "policies": {},
-      "checkConstraints": {},
-      "isRLSEnabled": false
-    },
-    "public.user_files": {
-      "name": "user_files",
-      "schema": "",
-      "columns": {
-        "id": {
-          "name": "id",
-          "type": "text",
-          "primaryKey": true,
-          "notNull": true
-        },
-        "user_id": {
-          "name": "user_id",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": false
-        },
-        "original_name": {
-          "name": "original_name",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": true
-        },
-        "stored_name": {
-          "name": "stored_name",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": true
-        },
-        "mime_type": {
-          "name": "mime_type",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": true
-        },
-        "size": {
-          "name": "size",
-          "type": "integer",
-          "primaryKey": false,
-          "notNull": true
-        },
-        "width": {
-          "name": "width",
-          "type": "integer",
-          "primaryKey": false,
-          "notNull": false
-        },
-        "height": {
-          "name": "height",
-          "type": "integer",
-          "primaryKey": false,
-          "notNull": false
-        },
-        "version": {
-          "name": "version",
           "type": "integer",
           "primaryKey": false,
           "notNull": true,
-          "default": 1
-        },
-        "parent_id": {
-          "name": "parent_id",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": false
-        },
-        "tool_chain": {
-          "name": "tool_chain",
-          "type": "jsonb",
-          "primaryKey": false,
-          "notNull": false
-        },
-        "created_at": {
-          "name": "created_at",
-          "type": "timestamp with time zone",
-          "primaryKey": false,
-          "notNull": true
+          "autoincrement": false
         }
       },
       "indexes": {},
-      "foreignKeys": {
-        "user_files_user_id_users_id_fk": {
-          "name": "user_files_user_id_users_id_fk",
-          "tableFrom": "user_files",
-          "tableTo": "users",
-          "columnsFrom": ["user_id"],
-          "columnsTo": ["id"],
-          "onDelete": "cascade",
-          "onUpdate": "no action"
-        }
-      },
+      "foreignKeys": {},
       "compositePrimaryKeys": {},
       "uniqueConstraints": {},
-      "policies": {},
-      "checkConstraints": {},
-      "isRLSEnabled": false
+      "checkConstraints": {}
     },
-    "public.users": {
+    "users": {
       "name": "users",
-      "schema": "",
       "columns": {
         "id": {
           "name": "id",
           "type": "text",
           "primaryKey": true,
-          "notNull": true
+          "notNull": true,
+          "autoincrement": false
         },
         "username": {
           "name": "username",
           "type": "text",
           "primaryKey": false,
-          "notNull": true
+          "notNull": true,
+          "autoincrement": false
         },
         "password_hash": {
           "name": "password_hash",
           "type": "text",
           "primaryKey": false,
-          "notNull": false
+          "notNull": true,
+          "autoincrement": false
         },
         "role": {
           "name": "role",
           "type": "text",
           "primaryKey": false,
           "notNull": true,
+          "autoincrement": false,
           "default": "'user'"
         },
-        "team": {
-          "name": "team",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": true,
-          "default": "'Default'"
-        },
         "must_change_password": {
           "name": "must_change_password",
-          "type": "boolean",
+          "type": "integer",
           "primaryKey": false,
           "notNull": true,
+          "autoincrement": false,
           "default": true
         },
-        "auth_provider": {
-          "name": "auth_provider",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": true,
-          "default": "'local'"
-        },
-        "external_id": {
-          "name": "external_id",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": false
-        },
-        "email": {
-          "name": "email",
-          "type": "text",
-          "primaryKey": false,
-          "notNull": false
-        },
         "created_at": {
           "name": "created_at",
-          "type": "timestamp with time zone",
+          "type": "integer",
           "primaryKey": false,
-          "notNull": true
+          "notNull": true,
+          "autoincrement": false
         },
         "updated_at": {
           "name": "updated_at",
-          "type": "timestamp with time zone",
+          "type": "integer",
           "primaryKey": false,
-          "notNull": true
-        },
-        "analytics_enabled": {
-          "name": "analytics_enabled",
-          "type": "boolean",
-          "primaryKey": false,
-          "notNull": false
-        },
-        "analytics_consent_shown_at": {
-          "name": "analytics_consent_shown_at",
-          "type": "timestamp with time zone",
-          "primaryKey": false,
-          "notNull": false
-        },
-        "analytics_consent_remind_at": {
-          "name": "analytics_consent_remind_at",
-          "type": "timestamp with time zone",
-          "primaryKey": false,
-          "notNull": false
+          "notNull": true,
+          "autoincrement": false
         }
       },
-      "indexes": {},
-      "foreignKeys": {},
-      "compositePrimaryKeys": {},
-      "uniqueConstraints": {
+      "indexes": {
         "users_username_unique": {
           "name": "users_username_unique",
-          "nullsNotDistinct": false,
-          "columns": ["username"]
+          "columns": ["username"],
+          "isUnique": true
         }
       },
-      "policies": {},
-      "checkConstraints": {},
-      "isRLSEnabled": false
+      "foreignKeys": {},
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {},
+      "checkConstraints": {}
     }
   },
-  "enums": {
-    "public.job_status": {
-      "name": "job_status",
-      "schema": "public",
-      "values": ["queued", "processing", "completed", "failed", "canceled"]
-    }
-  },
-  "schemas": {},
-  "sequences": {},
-  "roles": {},
-  "policies": {},
   "views": {},
+  "enums": {},
   "_meta": {
-    "columns": {},
     "schemas": {},
-    "tables": {}
+    "tables": {},
+    "columns": {}
+  },
+  "internal": {
+    "indexes": {}
   }
 }
diff --git a/apps/api/src/lib/media-tool.ts b/apps/api/src/lib/media-tool.ts
index 905f4d2c..295d04a0 100644
--- a/apps/api/src/lib/media-tool.ts
+++ b/apps/api/src/lib/media-tool.ts
@@ -32,6 +32,55 @@ export function audioContentType(ext: string): string {
   return EXT_AUDIO_CONTENT_TYPES[ext.toLowerCase()] || "audio/mpeg";
 }
 
+/** atempo only accepts 0.5..100; chain factors of 0.5 until in range. */
+export function buildAtempoChain(factor: number): string {
+  const parts: string[] = [];
+  let f = factor;
+  while (f < 0.5) {
+    parts.push("atempo=0.5");
+    f /= 0.5;
+  }
+  parts.push(`atempo=${f}`);
+  return parts.join(",");
+}
+
+export interface AudioOutput {
+  ext: string;
+  contentType: string;
+  encodeArgs: string[];
+}
+
+const AUDIO_OUTPUTS: Record<string, AudioOutput> = {
+  ".mp3": {
+    ext: ".mp3",
+    contentType: "audio/mpeg",
+    encodeArgs: ["-c:a", "libmp3lame", "-b:a", "192k"],
+  },
+  ".wav": { ext: ".wav", contentType: "audio/wav", encodeArgs: ["-c:a", "pcm_s16le"] },
+  ".ogg": {
+    ext: ".ogg",
+    contentType: "audio/ogg",
+    encodeArgs: ["-c:a", "libvorbis", "-b:a", "192k"],
+  },
+  ".opus": {
+    ext: ".opus",
+    contentType: "audio/opus",
+    encodeArgs: ["-c:a", "libopus", "-b:a", "128k"],
+  },
+  ".flac": { ext: ".flac", contentType: "audio/flac", encodeArgs: ["-c:a", "flac"] },
+  ".m4a": { ext: ".m4a", contentType: "audio/mp4", encodeArgs: ["-c:a", "aac", "-b:a", "192k"] },
+  ".aac": { ext: ".m4a", contentType: "audio/mp4", encodeArgs: ["-c:a", "aac", "-b:a", "192k"] },
+  ".aiff": { ext: ".aiff", contentType: "audio/aiff", encodeArgs: ["-c:a", "pcm_s16be"] },
+};
+
+/**
+ * Encoder selection for filtered (re-encoded) audio outputs, keyed by the
+ * SOURCE extension. Decode-only sources (wma/amr/ape/...) fall back to mp3.
+ */
+export function audioOutputFor(srcExt: string): AudioOutput {
+  return AUDIO_OUTPUTS[srcExt.toLowerCase()] ?? AUDIO_OUTPUTS[".mp3"];
+}
+
 export interface MediaRunResult {
   outPath: string;
   durationS: number | null;
@@ -57,9 +106,9 @@ export async function runFfmpegWithProgress(
   args: string[],
   durationS: number | null,
   opts: { timeoutMs?: number } = {},
-): Promise<void> {
+): Promise<string> {
   ctx.report(5, "Preparing");
-  await runFfmpeg(args, {
+  return runFfmpeg(args, {
     signal: ctx.signal,
     timeoutMs: opts.timeoutMs ?? 30 * 60_000,
     onProgress: (p) => {
diff --git a/apps/api/src/routes/tool-factory.ts b/apps/api/src/routes/tool-factory.ts
index e7f14f4a..7df69020 100644
--- a/apps/api/src/routes/tool-factory.ts
+++ b/apps/api/src/routes/tool-factory.ts
@@ -209,12 +209,15 @@ export function createToolRoute<T>(app: FastifyInstance, config: ToolRouteConfig
       let clientJobId: string | null = null;
       let fileCount = 0;
       const received: ReceivedUpload[] = [];
+      // Track last part for post-loop field recovery
+      let lastPart: { fields?: Record<string, unknown> } | undefined;
 
       // Parse multipart parts (file parts stream to object storage)
       try {
         const parts = request.parts();
 
         for await (const part of parts) {
+          lastPart = part as { fields?: Record<string, unknown> };
           if (part.type === "file") {
             fileCount++;
             if (fileCount > maxInputs) {
@@ -248,6 +251,31 @@ export function createToolRoute<T>(app: FastifyInstance, config: ToolRouteConfig
             }
           }
         }
+
+        // The upstream parts iterator can terminate before yielding trailing
+        // fields, but busboy has already populated part.fields on every part.
+        if (lastPart?.fields) {
+          const recover = (name: string): string | null => {
+            const f = lastPart?.fields?.[name];
+            const entry = Array.isArray(f) ? f[0] : f;
+            if (entry != null && typeof (entry as { value?: unknown }).value === "string") {
+              return (entry as { value: string }).value;
+            }
+            return null;
+          };
+          if (settingsRaw === null) {
+            settingsRaw = recover("settings");
+          }
+          if (fileId === null) {
+            fileId = recover("fileId");
+          }
+          if (clientJobId === null) {
+            const raw = recover("clientJobId");
+            if (raw !== null && raw.length > 0 && raw.length <= 128) {
+              clientJobId = raw;
+            }
+          }
+        }
       } catch (err) {
         return reply.status(400).send({
           error: "Failed to parse multipart request",
diff --git a/apps/api/src/routes/tools/audio-channels.ts b/apps/api/src/routes/tools/audio-channels.ts
new file mode 100644
index 00000000..1851290a
--- /dev/null
+++ b/apps/api/src/routes/tools/audio-channels.ts
@@ -0,0 +1,51 @@
+import { extname, join } from "node:path";
+import { probeMedia } from "@snapotter/media-engine";
+import type { FastifyInstance } from "fastify";
+import { z } from "zod";
+import { audioOutputFor, runFfmpegWithProgress, stageMediaInputs } from "../../lib/media-tool.js";
+import { InputValidationError } from "../../modality/contract.js";
+import { createToolRoute } from "../tool-factory.js";
+
+const settingsSchema = z.object({
+  mode: z.enum(["stereo-to-mono", "mono-to-stereo", "swap"]),
+});
+
+export function registerAudioChannels(app: FastifyInstance) {
+  createToolRoute(app, {
+    toolId: "audio-channels",
+    settingsSchema,
+    process: async () => {
+      throw new Error("audio-channels is v2-only");
+    },
+    processV2: async (ctx) => {
+      const settings = settingsSchema.parse(ctx.settings);
+      const origExt = extname(ctx.inputs[0].filename) || ".mp3";
+      const out = audioOutputFor(origExt);
+      const base = ctx.inputs[0].filename.replace(/\.[^.]+$/, "");
+      const outName = `${base}_channels${out.ext}`;
+
+      const [inPath] = await stageMediaInputs(ctx);
+      const info = await probeMedia(inPath);
+      const ch = info.streams.find((s) => s.type === "audio")?.channels ?? 0;
+
+      if ((settings.mode === "stereo-to-mono" || settings.mode === "swap") && ch < 2) {
+        throw new InputValidationError("This mode needs a stereo input", 422);
+      }
+
+      const outPath = join(ctx.scratchDir, "media", outName);
+      let args: string[];
+
+      if (settings.mode === "stereo-to-mono") {
+        args = ["-i", inPath, "-ac", "1", ...out.encodeArgs, outPath];
+      } else if (settings.mode === "mono-to-stereo") {
+        args = ["-i", inPath, "-ac", "2", ...out.encodeArgs, outPath];
+      } else {
+        // swap
+        args = ["-i", inPath, "-af", "pan=stereo|c0=c1|c1=c0", ...out.encodeArgs, outPath];
+      }
+
+      await runFfmpegWithProgress(ctx, args, info.durationS);
+      return { scratchPath: outPath, filename: outName, contentType: out.contentType };
+    },
+  });
+}
diff --git a/apps/api/src/routes/tools/audio-metadata.ts b/apps/api/src/routes/tools/audio-metadata.ts
new file mode 100644
index 00000000..e5fd839f
--- /dev/null
+++ b/apps/api/src/routes/tools/audio-metadata.ts
@@ -0,0 +1,67 @@
+import { extname, join } from "node:path";
+import { probeMedia } from "@snapotter/media-engine";
+import type { FastifyInstance } from "fastify";
+import { z } from "zod";
+import { audioContentType, runFfmpegWithProgress, stageMediaInputs } from "../../lib/media-tool.js";
+import { createToolRoute } from "../tool-factory.js";
+
+const settingsSchema = z.object({
+  strip: z.boolean().default(false),
+  title: z.string().max(500).optional(),
+  artist: z.string().max(500).optional(),
+  album: z.string().max(500).optional(),
+});
+
+export function registerAudioMetadata(app: FastifyInstance) {
+  createToolRoute(app, {
+    toolId: "audio-metadata",
+    settingsSchema,
+    process: async () => {
+      throw new Error("audio-metadata is v2-only");
+    },
+    processV2: async (ctx) => {
+      const settings = settingsSchema.parse(ctx.settings);
+      const srcExt = extname(ctx.inputs[0].filename) || ".mp3";
+      const base = ctx.inputs[0].filename.replace(/\.[^.]+$/, "");
+      const outName = `${base}_metadata${srcExt}`;
+      const contentType = audioContentType(srcExt);
+
+      const [inPath] = await stageMediaInputs(ctx);
+      const info = await probeMedia(inPath);
+
+      const args = ["-i", inPath];
+      if (settings.strip) {
+        args.push("-map_metadata", "-1");
+      }
+      for (const [key, value] of [
+        ["title", settings.title],
+        ["artist", settings.artist],
+        ["album", settings.album],
+      ] as const) {
+        if (value !== undefined) {
+          args.push("-metadata", `${key}=${value}`);
+        }
+      }
+      args.push("-c", "copy");
+
+      const outPath = join(ctx.scratchDir, "media", outName);
+      args.push(outPath);
+
+      await runFfmpegWithProgress(ctx, args, info.durationS);
+
+      return {
+        scratchPath: outPath,
+        filename: outName,
+        contentType,
+        resultPayload: {
+          metadata: {
+            container: info.container,
+            durationS: info.durationS,
+            bitrateKbps: info.bitrateKbps,
+            tags: info.tags ?? {},
+          },
+        },
+      };
+    },
+  });
+}
diff --git a/apps/api/src/routes/tools/audio-speed.ts b/apps/api/src/routes/tools/audio-speed.ts
new file mode 100644
index 00000000..5e959739
--- /dev/null
+++ b/apps/api/src/routes/tools/audio-speed.ts
@@ -0,0 +1,31 @@
+import { extname } from "node:path";
+import type { FastifyInstance } from "fastify";
+import { z } from "zod";
+import { audioOutputFor, buildAtempoChain, runMediaTool } from "../../lib/media-tool.js";
+import { createToolRoute } from "../tool-factory.js";
+
+const settingsSchema = z.object({
+  factor: z.number().min(0.25).max(4).default(1.5),
+});
+
+export function registerAudioSpeed(app: FastifyInstance) {
+  createToolRoute(app, {
+    toolId: "audio-speed",
+    settingsSchema,
+    process: async () => {
+      throw new Error("audio-speed is v2-only");
+    },
+    processV2: async (ctx) => {
+      const settings = settingsSchema.parse(ctx.settings);
+      const origExt = extname(ctx.inputs[0].filename) || ".mp3";
+      const out = audioOutputFor(origExt);
+      const base = ctx.inputs[0].filename.replace(/\.[^.]+$/, "");
+      const outName = `${base}_speed${out.ext}`;
+
+      const { outPath } = await runMediaTool(ctx, outName, (inPath, outPath) => {
+        return ["-i", inPath, "-af", buildAtempoChain(settings.factor), ...out.encodeArgs, outPath];
+      });
+      return { scratchPath: outPath, filename: outName, contentType: out.contentType };
+    },
+  });
+}
diff --git a/apps/api/src/routes/tools/fade-audio.ts b/apps/api/src/routes/tools/fade-audio.ts
new file mode 100644
index 00000000..1a83042a
--- /dev/null
+++ b/apps/api/src/routes/tools/fade-audio.ts
@@ -0,0 +1,62 @@
+import { extname, join } from "node:path";
+import { probeMedia } from "@snapotter/media-engine";
+import type { FastifyInstance } from "fastify";
+import { z } from "zod";
+import { audioOutputFor, runFfmpegWithProgress, stageMediaInputs } from "../../lib/media-tool.js";
+import { InputValidationError } from "../../modality/contract.js";
+import { createToolRoute } from "../tool-factory.js";
+
+const settingsSchema = z
+  .object({
+    fadeInS: z.number().min(0).max(30).default(1),
+    fadeOutS: z.number().min(0).max(30).default(1),
+  })
+  .refine((s) => s.fadeInS > 0 || s.fadeOutS > 0, {
+    message: "Set a fade-in or fade-out",
+  });
+
+export function registerFadeAudio(app: FastifyInstance) {
+  createToolRoute(app, {
+    toolId: "fade-audio",
+    settingsSchema,
+    process: async () => {
+      throw new Error("fade-audio is v2-only");
+    },
+    processV2: async (ctx) => {
+      const settings = settingsSchema.parse(ctx.settings);
+      const origExt = extname(ctx.inputs[0].filename) || ".mp3";
+      const out = audioOutputFor(origExt);
+      const base = ctx.inputs[0].filename.replace(/\.[^.]+$/, "");
+      const outName = `${base}_fade${out.ext}`;
+
+      const [inPath] = await stageMediaInputs(ctx);
+      const info = await probeMedia(inPath);
+      const d = info.durationS ?? 0;
+
+      if ((d === 0 || info.durationS === null) && settings.fadeOutS > 0) {
+        throw new InputValidationError("Could not determine audio duration for fade-out");
+      }
+
+      const fin = Math.min(settings.fadeInS, d);
+      const fout = Math.min(settings.fadeOutS, d);
+
+      const parts: string[] = [];
+      if (fin > 0) {
+        parts.push(`afade=t=in:st=0:d=${fin}`);
+      }
+      if (fout > 0) {
+        parts.push(`afade=t=out:st=${Math.max(0, d - fout)}:d=${fout}`);
+      }
+      const chain = parts.join(",");
+
+      const outPath = join(ctx.scratchDir, "media", outName);
+      await runFfmpegWithProgress(
+        ctx,
+        ["-i", inPath, "-af", chain, ...out.encodeArgs, outPath],
+        info.durationS,
+      );
+
+      return { scratchPath: outPath, filename: outName, contentType: out.contentType };
+    },
+  });
+}
diff --git a/apps/api/src/routes/tools/index.ts b/apps/api/src/routes/tools/index.ts
index 1dd65ae6..50815a62 100644
--- a/apps/api/src/routes/tools/index.ts
+++ b/apps/api/src/routes/tools/index.ts
@@ -5,6 +5,9 @@ import { db, schema } from "../../db/index.js";
 import { registerColorAdjustments } from "./adjust-colors.js";
 import { registerAiCanvasExpand } from "./ai-canvas-expand.js";
 import { registerAspectPad } from "./aspect-pad.js";
+import { registerAudioChannels } from "./audio-channels.js";
+import { registerAudioMetadata } from "./audio-metadata.js";
+import { registerAudioSpeed } from "./audio-speed.js";
 import { registerBarcodeRead } from "./barcode-read.js";
 import { registerBeautify } from "./beautify.js";
 import { registerBlurFaces } from "./blur-faces.js";
@@ -39,6 +42,7 @@ import { registerEraseObject } from "./erase-object.js";
 import { registerExtractAudio } from "./extract-audio.js";
 import { registerExtractPages } from "./extract-pages.js";
 import { registerExtractSubtitles } from "./extract-subtitles.js";
+import { registerFadeAudio } from "./fade-audio.js";
 import { registerFavicon } from "./favicon.js";
 import { registerFindDuplicates } from "./find-duplicates.js";
 import { registerFlattenPdf } from "./flatten-pdf.js";
@@ -56,10 +60,13 @@ import { registerJsonXml } from "./json-xml.js";
 import { registerLinearizePdf } from "./linearize-pdf.js";
 import { registerMarkdownToPdf } from "./markdown-to-pdf.js";
 import { registerMemeGenerator } from "./meme-generator.js";
+import { registerMergeAudio } from "./merge-audio.js";
 import { registerMergePdf } from "./merge-pdf.js";
 import { registerMergeVideos } from "./merge-videos.js";
 import { registerMuteVideo } from "./mute-video.js";
+import { registerNoiseReduction } from "./noise-reduction.js";
 import { registerNoiseRemoval } from "./noise-removal.js";
+import { registerNormalizeAudio } from "./normalize-audio.js";
 import { registerNupPdf } from "./nup-pdf.js";
 import { registerOcr } from "./ocr.js";
 import { registerOptimizeForWeb } from "./optimize-for-web.js";
@@ -71,6 +78,7 @@ import { registerPdfToImage } from "./pdf-to-image.js";
 import { registerPdfToText } from "./pdf-to-text.js";
 import { registerPdfToWord } from "./pdf-to-word.js";
 import { registerPdfaConvert } from "./pdfa-convert.js";
+import { registerPitchShift } from "./pitch-shift.js";
 import { registerProtectPdf } from "./protect-pdf.js";
 import { registerQrGenerate } from "./qr-generate.js";
 import { registerRedEyeRemoval } from "./red-eye-removal.js";
@@ -83,13 +91,17 @@ import { registerReplaceColor } from "./replace-color.js";
 import { registerResize } from "./resize.js";
 import { registerResizeVideo } from "./resize-video.js";
 import { registerRestorePhoto } from "./restore-photo.js";
+import { registerReverseAudio } from "./reverse-audio.js";
 import { registerReverseVideo } from "./reverse-video.js";
+import { registerRingtoneMaker } from "./ringtone-maker.js";
 import { registerRotate } from "./rotate.js";
 import { registerRotatePdf } from "./rotate-pdf.js";
 import { registerRotateVideo } from "./rotate-video.js";
 import { registerSharpening } from "./sharpening.js";
+import { registerSilenceRemoval } from "./silence-removal.js";
 import { registerSmartCrop } from "./smart-crop.js";
 import { registerSplit } from "./split.js";
+import { registerSplitAudio } from "./split-audio.js";
 import { registerSplitCsv } from "./split-csv.js";
 import { registerSplitPdf } from "./split-pdf.js";
 import { registerStabilizeVideo } from "./stabilize-video.js";
@@ -110,10 +122,12 @@ import { registerVideoSpeed } from "./video-speed.js";
 import { registerVideoToFrames } from "./video-to-frames.js";
 import { registerVideoToGif } from "./video-to-gif.js";
 import { registerVideoToWebp } from "./video-to-webp.js";
+import { registerVolumeAdjust } from "./volume-adjust.js";
 import { registerWatermarkImage } from "./watermark-image.js";
 import { registerWatermarkPdf } from "./watermark-pdf.js";
 import { registerWatermarkText } from "./watermark-text.js";
 import { registerWatermarkVideo } from "./watermark-video.js";
+import { registerWaveformImage } from "./waveform-image.js";
 import { registerWordToPdf } from "./word-to-pdf.js";
 
 /**
@@ -229,9 +243,23 @@ export async function registerToolRoutes(app: FastifyInstance): Promise<void> {
     { id: "watermark-video", register: registerWatermarkVideo },
 
     // Audio
+    { id: "audio-channels", register: registerAudioChannels },
+    { id: "audio-metadata", register: registerAudioMetadata },
+    { id: "audio-speed", register: registerAudioSpeed },
     { id: "convert-audio", register: registerConvertAudio },
-    { id: "trim-audio", register: registerTrimAudio },
     { id: "extract-audio", register: registerExtractAudio },
+    { id: "fade-audio", register: registerFadeAudio },
+    { id: "merge-audio", register: registerMergeAudio },
+    { id: "noise-reduction", register: registerNoiseReduction },
+    { id: "normalize-audio", register: registerNormalizeAudio },
+    { id: "pitch-shift", register: registerPitchShift },
+    { id: "reverse-audio", register: registerReverseAudio },
+    { id: "ringtone-maker", register: registerRingtoneMaker },
+    { id: "silence-removal", register: registerSilenceRemoval },
+    { id: "split-audio", register: registerSplitAudio },
+    { id: "trim-audio", register: registerTrimAudio },
+    { id: "volume-adjust", register: registerVolumeAdjust },
+    { id: "waveform-image", register: registerWaveformImage },
 
     // PDF & Documents
     { id: "merge-pdf", register: registerMergePdf },
diff --git a/apps/api/src/routes/tools/merge-audio.ts b/apps/api/src/routes/tools/merge-audio.ts
new file mode 100644
index 00000000..f110a9fa
--- /dev/null
+++ b/apps/api/src/routes/tools/merge-audio.ts
@@ -0,0 +1,85 @@
+import { mkdir } from "node:fs/promises";
+import { join } from "node:path";
+import { probeMedia } from "@snapotter/media-engine";
+import type { FastifyInstance } from "fastify";
+import { z } from "zod";
+import { runFfmpegWithProgress, stageMediaInputs } from "../../lib/media-tool.js";
+import { InputValidationError } from "../../modality/contract.js";
+import { createToolRoute } from "../tool-factory.js";
+
+const settingsSchema = z.object({
+  format: z.enum(["mp3", "wav", "flac", "m4a"]).default("mp3"),
+});
+
+const CONTENT_TYPES: Record<string, string> = {
+  mp3: "audio/mpeg",
+  wav: "audio/wav",
+  flac: "audio/flac",
+  m4a: "audio/mp4",
+};
+
+const ENCODERS: Record<string, string[]> = {
+  mp3: ["-c:a", "libmp3lame", "-b:a", "192k"],
+  wav: ["-c:a", "pcm_s16le"],
+  flac: ["-c:a", "flac"],
+  m4a: ["-c:a", "aac", "-b:a", "192k"],
+};
+
+export function registerMergeAudio(app: FastifyInstance) {
+  createToolRoute(app, {
+    toolId: "merge-audio",
+    maxInputs: 10,
+    settingsSchema,
+    process: async () => {
+      throw new Error("merge-audio is v2-only");
+    },
+    processV2: async (ctx) => {
+      if (ctx.inputs.length < 2) {
+        throw new InputValidationError("Merging needs at least two audio files");
+      }
+
+      const settings = settingsSchema.parse(ctx.settings);
+      const paths = await stageMediaInputs(ctx);
+
+      // Probe each for total duration (progress mapping)
+      let totalS = 0;
+      for (const p of paths) {
+        const info = await probeMedia(p);
+        totalS += info.durationS ?? 0;
+      }
+
+      // Build per-input normalize chains + audio-only concat
+      const parts: string[] = [];
+      const refs: string[] = [];
+      for (let i = 0; i < paths.length; i++) {
+        parts.push(
+          `[${i}:a]aresample=44100,aformat=sample_fmts=fltp:channel_layouts=stereo[a${i}]`,
+        );
+        refs.push(`[a${i}]`);
+      }
+      const filter = `${parts.join(";")};\n${refs.join("")}concat=n=${paths.length}:v=0:a=1[a]`;
+
+      const dir = join(ctx.scratchDir, "media");
+      await mkdir(dir, { recursive: true });
+      const outPath = join(dir, `merged.${settings.format}`);
+
+      const args = [
+        ...paths.flatMap((p) => ["-i", p]),
+        "-filter_complex",
+        filter,
+        "-map",
+        "[a]",
+        ...ENCODERS[settings.format],
+        outPath,
+      ];
+
+      await runFfmpegWithProgress(ctx, args, totalS || null);
+
+      return {
+        scratchPath: outPath,
+        filename: `merged.${settings.format}`,
+        contentType: CONTENT_TYPES[settings.format],
+      };
+    },
+  });
+}
diff --git a/apps/api/src/routes/tools/noise-reduction.ts b/apps/api/src/routes/tools/noise-reduction.ts
new file mode 100644
index 00000000..8ac3b84a
--- /dev/null
+++ b/apps/api/src/routes/tools/noise-reduction.ts
@@ -0,0 +1,40 @@
+import { extname } from "node:path";
+import type { FastifyInstance } from "fastify";
+import { z } from "zod";
+import { audioOutputFor, runMediaTool } from "../../lib/media-tool.js";
+import { createToolRoute } from "../tool-factory.js";
+
+const NR_MAP: Record<string, number> = {
+  light: 6,
+  medium: 12,
+  strong: 24,
+};
+
+const settingsSchema = z.object({
+  strength: z.enum(["light", "medium", "strong"]).default("medium"),
+});
+
+export function registerNoiseReduction(app: FastifyInstance) {
+  createToolRoute(app, {
+    toolId: "noise-reduction",
+    settingsSchema,
+    process: async () => {
+      throw new Error("noise-reduction is v2-only");
+    },
+    processV2: async (ctx) => {
+      const settings = settingsSchema.parse(ctx.settings);
+      const origExt = extname(ctx.inputs[0].filename) || ".mp3";
+      const out = audioOutputFor(origExt);
+      const base = ctx.inputs[0].filename.replace(/\.[^.]+$/, "");
+      const outName = `${base}_denoised${out.ext}`;
+
+      const nr = NR_MAP[settings.strength];
+      const chain = `afftdn=nr=${nr}:nf=-50`;
+
+      const { outPath } = await runMediaTool(ctx, outName, (inPath, outPath) => {
+        return ["-i", inPath, "-af", chain, ...out.encodeArgs, outPath];
+      });
+      return { scratchPath: outPath, filename: outName, contentType: out.contentType };
+    },
+  });
+}
diff --git a/apps/api/src/routes/tools/normalize-audio.ts b/apps/api/src/routes/tools/normalize-audio.ts
new file mode 100644
index 00000000..3a690f25
--- /dev/null
+++ b/apps/api/src/routes/tools/normalize-audio.ts
@@ -0,0 +1,28 @@
+import { extname } from "node:path";
+import type { FastifyInstance } from "fastify";
+import { z } from "zod";
+import { audioOutputFor, runMediaTool } from "../../lib/media-tool.js";
+import { createToolRoute } from "../tool-factory.js";
+
+const settingsSchema = z.object({});
+
+export function registerNormalizeAudio(app: FastifyInstance) {
+  createToolRoute(app, {
+    toolId: "normalize-audio",
+    settingsSchema,
+    process: async () => {
+      throw new Error("normalize-audio is v2-only");
+    },
+    processV2: async (ctx) => {
+      const origExt = extname(ctx.inputs[0].filename) || ".mp3";
+      const out = audioOutputFor(origExt);
+      const base = ctx.inputs[0].filename.replace(/\.[^.]+$/, "");
+      const outName = `${base}_normalized${out.ext}`;
+
+      const { outPath } = await runMediaTool(ctx, outName, (inPath, outPath) => {
+        return ["-i", inPath, "-af", "loudnorm=I=-16:TP=-1.5:LRA=11", ...out.encodeArgs, outPath];
+      });
+      return { scratchPath: outPath, filename: outName, contentType: out.contentType };
+    },
+  });
+}
diff --git a/apps/api/src/routes/tools/pitch-shift.ts b/apps/api/src/routes/tools/pitch-shift.ts
new file mode 100644
index 00000000..2e131cdb
--- /dev/null
+++ b/apps/api/src/routes/tools/pitch-shift.ts
@@ -0,0 +1,35 @@
+import { extname } from "node:path";
+import type { FastifyInstance } from "fastify";
+import { z } from "zod";
+import { audioOutputFor, runMediaTool } from "../../lib/media-tool.js";
+import { createToolRoute } from "../tool-factory.js";
+
+const settingsSchema = z
+  .object({
+    semitones: z.number().int().min(-12).max(12).default(3),
+  })
+  .refine((s) => s.semitones !== 0, { message: "Semitones must be nonzero" });
+
+export function registerPitchShift(app: FastifyInstance) {
+  createToolRoute(app, {
+    toolId: "pitch-shift",
+    settingsSchema,
+    process: async () => {
+      throw new Error("pitch-shift is v2-only");
+    },
+    processV2: async (ctx) => {
+      const settings = settingsSchema.parse(ctx.settings);
+      const origExt = extname(ctx.inputs[0].filename) || ".mp3";
+      const out = audioOutputFor(origExt);
+      const base = ctx.inputs[0].filename.replace(/\.[^.]+$/, "");
+      const outName = `${base}_pitch${out.ext}`;
+
+      const ratio = (2 ** (settings.semitones / 12)).toFixed(6);
+
+      const { outPath } = await runMediaTool(ctx, outName, (inPath, outPath) => {
+        return ["-i", inPath, "-af", `rubberband=pitch=${ratio}`, ...out.encodeArgs, outPath];
+      });
+      return { scratchPath: outPath, filename: outName, contentType: out.contentType };
+    },
+  });
+}
diff --git a/apps/api/src/routes/tools/reverse-audio.ts b/apps/api/src/routes/tools/reverse-audio.ts
new file mode 100644
index 00000000..4efe5f61
--- /dev/null
+++ b/apps/api/src/routes/tools/reverse-audio.ts
@@ -0,0 +1,28 @@
+import { extname } from "node:path";
+import type { FastifyInstance } from "fastify";
+import { z } from "zod";
+import { audioOutputFor, runMediaTool } from "../../lib/media-tool.js";
+import { createToolRoute } from "../tool-factory.js";
+
+const settingsSchema = z.object({});
+
+export function registerReverseAudio(app: FastifyInstance) {
+  createToolRoute(app, {
+    toolId: "reverse-audio",
+    settingsSchema,
+    process: async () => {
+      throw new Error("reverse-audio is v2-only");
+    },
+    processV2: async (ctx) => {
+      const origExt = extname(ctx.inputs[0].filename) || ".mp3";
+      const out = audioOutputFor(origExt);
+      const base = ctx.inputs[0].filename.replace(/\.[^.]+$/, "");
+      const outName = `${base}_reversed${out.ext}`;
+
+      const { outPath } = await runMediaTool(ctx, outName, (inPath, outPath) => {
+        return ["-i", inPath, "-af", "areverse", ...out.encodeArgs, outPath];
+      });
+      return { scratchPath: outPath, filename: outName, contentType: out.contentType };
+    },
+  });
+}
diff --git a/apps/api/src/routes/tools/ringtone-maker.ts b/apps/api/src/routes/tools/ringtone-maker.ts
new file mode 100644
index 00000000..f8732828
--- /dev/null
+++ b/apps/api/src/routes/tools/ringtone-maker.ts
@@ -0,0 +1,58 @@
+import { join } from "node:path";
+import { probeMedia } from "@snapotter/media-engine";
+import type { FastifyInstance } from "fastify";
+import { z } from "zod";
+import { runFfmpegWithProgress, stageMediaInputs } from "../../lib/media-tool.js";
+import { InputValidationError } from "../../modality/contract.js";
+import { createToolRoute } from "../tool-factory.js";
+
+const settingsSchema = z.object({
+  startS: z.number().min(0).default(0),
+  durationS: z.number().min(1).max(30).default(30),
+});
+
+export function registerRingtoneMaker(app: FastifyInstance) {
+  createToolRoute(app, {
+    toolId: "ringtone-maker",
+    settingsSchema,
+    process: async () => {
+      throw new Error("ringtone-maker is v2-only");
+    },
+    processV2: async (ctx) => {
+      const settings = settingsSchema.parse(ctx.settings);
+      const base = ctx.inputs[0].filename.replace(/\.[^.]+$/, "");
+      const outName = `${base}.m4r`;
+
+      const [inPath] = await stageMediaInputs(ctx);
+      const info = await probeMedia(inPath);
+
+      if (settings.startS >= (info.durationS ?? Infinity)) {
+        throw new InputValidationError("Start is beyond the end of the audio");
+      }
+
+      const outPath = join(ctx.scratchDir, "media", outName);
+      await runFfmpegWithProgress(
+        ctx,
+        [
+          "-ss",
+          String(settings.startS),
+          "-t",
+          String(settings.durationS),
+          "-i",
+          inPath,
+          "-vn",
+          "-c:a",
+          "aac",
+          "-b:a",
+          "192k",
+          "-f",
+          "ipod",
+          outPath,
+        ],
+        info.durationS,
+      );
+
+      return { scratchPath: outPath, filename: outName, contentType: "audio/mp4" };
+    },
+  });
+}
diff --git a/apps/api/src/routes/tools/silence-removal.ts b/apps/api/src/routes/tools/silence-removal.ts
new file mode 100644
index 00000000..d3e94c41
--- /dev/null
+++ b/apps/api/src/routes/tools/silence-removal.ts
@@ -0,0 +1,38 @@
+import { extname } from "node:path";
+import type { FastifyInstance } from "fastify";
+import { z } from "zod";
+import { audioOutputFor, runMediaTool } from "../../lib/media-tool.js";
+import { createToolRoute } from "../tool-factory.js";
+
+const settingsSchema = z.object({
+  thresholdDb: z.number().min(-80).max(-20).default(-50),
+  minSilenceS: z.number().min(0.1).max(5).default(0.5),
+});
+
+export function registerSilenceRemoval(app: FastifyInstance) {
+  createToolRoute(app, {
+    toolId: "silence-removal",
+    settingsSchema,
+    process: async () => {
+      throw new Error("silence-removal is v2-only");
+    },
+    processV2: async (ctx) => {
+      const settings = settingsSchema.parse(ctx.settings);
+      const origExt = extname(ctx.inputs[0].filename) || ".mp3";
+      const out = audioOutputFor(origExt);
+      const base = ctx.inputs[0].filename.replace(/\.[^.]+$/, "");
+      const outName = `${base}_nosilence${out.ext}`;
+
+      const t = settings.thresholdDb;
+      const d = settings.minSilenceS;
+      const chain =
+        `silenceremove=start_periods=1:start_threshold=${t}dB:start_silence=0.1` +
+        `:stop_periods=-1:stop_threshold=${t}dB:stop_duration=${d}`;
+
+      const { outPath } = await runMediaTool(ctx, outName, (inPath, outPath) => {
+        return ["-i", inPath, "-af", chain, ...out.encodeArgs, outPath];
+      });
+      return { scratchPath: outPath, filename: outName, contentType: out.contentType };
+    },
+  });
+}
diff --git a/apps/api/src/routes/tools/split-audio.ts b/apps/api/src/routes/tools/split-audio.ts
new file mode 100644
index 00000000..6566cb9a
--- /dev/null
+++ b/apps/api/src/routes/tools/split-audio.ts
@@ -0,0 +1,145 @@
+import { createWriteStream } from "node:fs";
+import { mkdir, readdir } from "node:fs/promises";
+import { extname, join } from "node:path";
+import { probeMedia, runFfmpeg } from "@snapotter/media-engine";
+import archiver from "archiver";
+import type { FastifyInstance } from "fastify";
+import { z } from "zod";
+import { stageMediaInputs } from "../../lib/media-tool.js";
+import { InputValidationError } from "../../modality/contract.js";
+import { createToolRoute } from "../tool-factory.js";
+
+const settingsSchema = z.object({
+  mode: z.enum(["time", "parts", "silence"]).default("time"),
+  segmentS: z.number().min(1).max(3600).default(60),
+  parts: z.number().int().min(2).max(20).default(2),
+  thresholdDb: z.number().min(-80).max(-20).default(-40),
+  minSilenceS: z.number().min(0.1).max(10).default(0.3),
+});
+
+export function registerSplitAudio(app: FastifyInstance) {
+  createToolRoute(app, {
+    toolId: "split-audio",
+    settingsSchema,
+    process: async () => {
+      throw new Error("split-audio is v2-only");
+    },
+    processV2: async (ctx) => {
+      const settings = settingsSchema.parse(ctx.settings);
+      const base = ctx.inputs[0].filename.replace(/\.[^.]+$/, "");
+      const srcExt = extname(ctx.inputs[0].filename) || ".mp3";
+
+      const [inPath] = await stageMediaInputs(ctx);
+      const info = await probeMedia(inPath);
+      const duration = info.durationS;
+
+      const framesDir = join(ctx.scratchDir, "media", "parts");
+      await mkdir(framesDir, { recursive: true });
+
+      if (settings.mode === "time" || settings.mode === "parts") {
+        let segLen: number;
+        if (settings.mode === "parts") {
+          if (duration === null || duration === undefined) {
+            throw new InputValidationError("Could not determine audio duration");
+          }
+          segLen = Math.max(0.1, duration / settings.parts + 0.001);
+        } else {
+          segLen = settings.segmentS;
+        }
+
+        ctx.report(5, "Splitting audio");
+        await runFfmpeg(
+          [
+            "-i",
+            inPath,
+            "-f",
+            "segment",
+            "-segment_time",
+            String(segLen),
+            "-c",
+            "copy",
+            join(framesDir, `part-%03d${srcExt}`),
+          ],
+          { signal: ctx.signal, timeoutMs: 10 * 60_000 },
+        );
+      } else {
+        // silence mode: pass 1 - detect silence regions
+        ctx.report(5, "Detecting silence");
+        const nullOut = join(ctx.scratchDir, "media", "null.out");
+        const stderr = await runFfmpeg(
+          [
+            "-i",
+            inPath,
+            "-af",
+            `silencedetect=noise=${settings.thresholdDb}dB:d=${settings.minSilenceS}`,
+            "-f",
+            "null",
+            nullOut,
+          ],
+          { signal: ctx.signal, timeoutMs: 10 * 60_000 },
+        );
+
+        // Parse silence_start / silence_end pairs and compute midpoints
+        const starts = [...stderr.matchAll(/silence_start:\s*([\d.]+)/g)].map((m) => Number(m[1]));
+        const ends = [...stderr.matchAll(/silence_end:\s*([\d.]+)/g)].map((m) => Number(m[1]));
+        const cuts: number[] = [];
+        for (let i = 0; i < Math.min(starts.length, ends.length); i++) {
+          cuts.push((starts[i] + ends[i]) / 2);
+        }
+        if (cuts.length === 0) {
+          throw new InputValidationError("No silence found to split at");
+        }
+
+        // Build segment boundaries
+        const d = duration ?? 0;
+        const boundaries = [0, ...cuts, d];
+        const total = boundaries.length - 1;
+
+        for (let seg = 0; seg < total; seg++) {
+          const from = boundaries[seg];
+          const to = boundaries[seg + 1];
+          const partPath = join(framesDir, `part-${String(seg).padStart(3, "0")}${srcExt}`);
+          ctx.report(
+            Math.min(90, 10 + Math.round(((seg + 1) / total) * 80)),
+            `Extracting segment ${seg + 1}/${total}`,
+          );
+          await runFfmpeg(
+            ["-ss", String(from), "-to", String(to), "-i", inPath, "-c", "copy", partPath],
+            {
+              signal: ctx.signal,
+              timeoutMs: 60_000,
+            },
+          );
+        }
+      }
+
+      // Collect produced parts
+      const files = (await readdir(framesDir)).filter((f) => f.endsWith(srcExt));
+      files.sort();
+      if (files.length < 2) {
+        throw new InputValidationError("Nothing to split: output would be a single segment");
+      }
+
+      // Zip parts (same pattern as video-to-frames)
+      ctx.report(92, "Creating archive");
+      const zipPath = join(ctx.scratchDir, "media", `${base}_parts.zip`);
+      await new Promise<void>((resolve, reject) => {
+        const output = createWriteStream(zipPath);
+        const archive = archiver("zip", { zlib: { level: 5 } });
+        output.on("close", () => resolve());
+        archive.on("error", (err: Error) => reject(err));
+        archive.pipe(output);
+        for (const f of files) {
+          archive.file(join(framesDir, f), { name: f });
+        }
+        void archive.finalize();
+      });
+
+      return {
+        scratchPath: zipPath,
+        filename: `${base}_parts.zip`,
+        contentType: "application/zip",
+      };
+    },
+  });
+}
diff --git a/apps/api/src/routes/tools/video-speed.ts b/apps/api/src/routes/tools/video-speed.ts
index fc0c5520..5c817cd7 100644
--- a/apps/api/src/routes/tools/video-speed.ts
+++ b/apps/api/src/routes/tools/video-speed.ts
@@ -2,7 +2,12 @@ import { extname, join } from "node:path";
 import { probeMedia, resolveEncoder } from "@snapotter/media-engine";
 import type { FastifyInstance } from "fastify";
 import { z } from "zod";
-import { runFfmpegWithProgress, stageMediaInputs, videoContentType } from "../../lib/media-tool.js";
+import {
+  buildAtempoChain,
+  runFfmpegWithProgress,
+  stageMediaInputs,
+  videoContentType,
+} from "../../lib/media-tool.js";
 import { createToolRoute } from "../tool-factory.js";
 
 const settingsSchema = z.object({
@@ -10,18 +15,6 @@ const settingsSchema = z.object({
   keepPitch: z.boolean().default(true),
 });
 
-/** atempo only accepts 0.5..100; chain factors of 0.5 until in range. */
-export function buildAtempoChain(factor: number): string {
-  const parts: string[] = [];
-  let f = factor;
-  while (f < 0.5) {
-    parts.push("atempo=0.5");
-    f /= 0.5;
-  }
-  parts.push(`atempo=${f}`);
-  return parts.join(",");
-}
-
 export function registerVideoSpeed(app: FastifyInstance) {
   createToolRoute(app, {
     toolId: "video-speed",
diff --git a/apps/api/src/routes/tools/volume-adjust.ts b/apps/api/src/routes/tools/volume-adjust.ts
new file mode 100644
index 00000000..2e4ae299
--- /dev/null
+++ b/apps/api/src/routes/tools/volume-adjust.ts
@@ -0,0 +1,31 @@
+import { extname } from "node:path";
+import type { FastifyInstance } from "fastify";
+import { z } from "zod";
+import { audioOutputFor, runMediaTool } from "../../lib/media-tool.js";
+import { createToolRoute } from "../tool-factory.js";
+
+const settingsSchema = z.object({
+  gainDb: z.number().min(-30).max(30).default(3),
+});
+
+export function registerVolumeAdjust(app: FastifyInstance) {
+  createToolRoute(app, {
+    toolId: "volume-adjust",
+    settingsSchema,
+    process: async () => {
+      throw new Error("volume-adjust is v2-only");
+    },
+    processV2: async (ctx) => {
+      const settings = settingsSchema.parse(ctx.settings);
+      const origExt = extname(ctx.inputs[0].filename) || ".mp3";
+      const out = audioOutputFor(origExt);
+      const base = ctx.inputs[0].filename.replace(/\.[^.]+$/, "");
+      const outName = `${base}_volume${out.ext}`;
+
+      const { outPath } = await runMediaTool(ctx, outName, (inPath, outPath) => {
+        return ["-i", inPath, "-af", `volume=${settings.gainDb}dB`, ...out.encodeArgs, outPath];
+      });
+      return { scratchPath: outPath, filename: outName, contentType: out.contentType };
+    },
+  });
+}
diff --git a/apps/api/src/routes/tools/waveform-image.ts b/apps/api/src/routes/tools/waveform-image.ts
new file mode 100644
index 00000000..19a19a94
--- /dev/null
+++ b/apps/api/src/routes/tools/waveform-image.ts
@@ -0,0 +1,46 @@
+import type { FastifyInstance } from "fastify";
+import { z } from "zod";
+import { runMediaTool } from "../../lib/media-tool.js";
+import { createToolRoute } from "../tool-factory.js";
+
+const settingsSchema = z.object({
+  width: z.number().int().min(256).max(3840).default(1024),
+  height: z.number().int().min(64).max(1080).default(256),
+  color: z
+    .string()
+    .regex(/^#[0-9a-fA-F]{6}$/)
+    .default("#4f46e5"),
+});
+
+export function registerWaveformImage(app: FastifyInstance) {
+  createToolRoute(app, {
+    toolId: "waveform-image",
+    settingsSchema,
+    process: async () => {
+      throw new Error("waveform-image is v2-only");
+    },
+    processV2: async (ctx) => {
+      const settings = settingsSchema.parse(ctx.settings);
+      const base = ctx.inputs[0].filename.replace(/\.[^.]+$/, "");
+      const outName = `${base}_waveform.png`;
+
+      const c = settings.color.replace("#", "0x");
+      const w = settings.width;
+      const h = settings.height;
+
+      const { outPath } = await runMediaTool(ctx, outName, (inPath, outPath) => {
+        return [
+          "-i",
+          inPath,
+          "-filter_complex",
+          `showwavespic=s=${w}x${h}:colors=${c}`,
+          "-frames:v",
+          "1",
+          outPath,
+        ];
+      });
+
+      return { scratchPath: outPath, filename: outName, contentType: "image/png" };
+    },
+  });
+}
diff --git a/apps/web/src/components/tools/audio-channels-settings.tsx b/apps/web/src/components/tools/audio-channels-settings.tsx
new file mode 100644
index 00000000..5bf92097
--- /dev/null
+++ b/apps/web/src/components/tools/audio-channels-settings.tsx
@@ -0,0 +1,73 @@
+import { useState } from "react";
+import { ProgressCard } from "@/components/common/progress-card";
+import { useTranslation } from "@/contexts/i18n-context";
+import { useToolProcessor } from "@/hooks/use-tool-processor";
+import { format } from "@/lib/format";
+import { useFileStore } from "@/stores/file-store";
+
+type ChannelMode = "stereo-to-mono" | "mono-to-stereo" | "swap";
+
+export function AudioChannelsSettings() {
+  const { t } = useTranslation();
+  const s = t.toolSettings["audio-channels"];
+  const { files } = useFileStore();
+  const { processFiles, processAllFiles, processing, error, progress } =
+    useToolProcessor("audio-channels");
+
+  const [mode, setMode] = useState<ChannelMode>("mono-to-stereo");
+
+  const hasFile = files.length > 0;
+  const hasMultiple = files.length > 1;
+
+  const handleProcess = () => {
+    const settings = { mode };
+    if (hasMultiple) {
+      processAllFiles(files, settings);
+    } else {
+      processFiles(files, settings);
+    }
+  };
+
+  return (
+    <div className="space-y-4">
+      <div>
+        <label htmlFor="ac-mode" className="text-xs text-muted-foreground">
+          {s.mode}
+        </label>
+        <select
+          id="ac-mode"
+          value={mode}
+          onChange={(e) => setMode(e.target.value as ChannelMode)}
+          className="w-full mt-0.5 px-2 py-1.5 rounded border border-border bg-background text-sm text-foreground"
+        >
+          <option value="stereo-to-mono">{s["stereo-to-mono"]}</option>
+          <option value="mono-to-stereo">{s["mono-to-stereo"]}</option>
+          <option value="swap">{s.swap}</option>
+        </select>
+      </div>
+
+      {error && <p className="text-xs text-red-500">{error}</p>}
+
+      {processing ? (
+        <ProgressCard
+          active={processing}
+          phase={progress.phase === "idle" ? "uploading" : progress.phase}
+          label={s.progressLabel}
+          stage={progress.stage}
+          percent={progress.percent}
+          elapsed={progress.elapsed}
+        />
+      ) : (
+        <button
+          type="button"
+          data-testid="audio-channels-submit"
+          onClick={handleProcess}
+          disabled={!hasFile || processing}
+          className="w-full py-2.5 rounded-lg bg-primary text-primary-foreground font-medium disabled:opacity-50 disabled:cursor-not-allowed"
+        >
+          {hasMultiple ? format(s.submitBatch, { count: files.length }) : s.submit}
+        </button>
+      )}
+    </div>
+  );
+}
diff --git a/apps/web/src/components/tools/audio-metadata-settings.tsx b/apps/web/src/components/tools/audio-metadata-settings.tsx
new file mode 100644
index 00000000..bf69351d
--- /dev/null
+++ b/apps/web/src/components/tools/audio-metadata-settings.tsx
@@ -0,0 +1,113 @@
+import { useState } from "react";
+import { ProgressCard } from "@/components/common/progress-card";
+import { useTranslation } from "@/contexts/i18n-context";
+import { useToolProcessor } from "@/hooks/use-tool-processor";
+import { format } from "@/lib/format";
+import { useFileStore } from "@/stores/file-store";
+
+export function AudioMetadataSettings() {
+  const { t } = useTranslation();
+  const s = t.toolSettings["audio-metadata"];
+  const { files } = useFileStore();
+  const { processFiles, processAllFiles, processing, error, progress } =
+    useToolProcessor("audio-metadata");
+
+  const [strip, setStrip] = useState(false);
+  const [title, setTitle] = useState("");
+  const [artist, setArtist] = useState("");
+  const [album, setAlbum] = useState("");
+
+  const hasFile = files.length > 0;
+  const hasMultiple = files.length > 1;
+
+  const handleProcess = () => {
+    const settings: Record<string, unknown> = { strip };
+    if (title) settings.title = title;
+    if (artist) settings.artist = artist;
+    if (album) settings.album = album;
+    if (hasMultiple) {
+      processAllFiles(files, settings);
+    } else {
+      processFiles(files, settings);
+    }
+  };
+
+  return (
+    <div className="space-y-4">
+      <label className="flex items-center gap-2 text-sm text-foreground">
+        <input
+          type="checkbox"
+          checked={strip}
+          onChange={(e) => setStrip(e.target.checked)}
+          className="rounded"
+        />
+        {s.strip}
+      </label>
+
+      <div>
+        <label htmlFor="am-title" className="text-xs text-muted-foreground">
+          {s.title}
+        </label>
+        <input
+          id="am-title"
+          type="text"
+          maxLength={500}
+          value={title}
+          onChange={(e) => setTitle(e.target.value)}
+          className="w-full mt-0.5 px-2 py-1.5 rounded border border-border bg-background text-sm text-foreground"
+        />
+      </div>
+
+      <div>
+        <label htmlFor="am-artist" className="text-xs text-muted-foreground">
+          {s.artist}
+        </label>
+        <input
+          id="am-artist"
+          type="text"
+          maxLength={500}
+          value={artist}
+          onChange={(e) => setArtist(e.target.value)}
+          className="w-full mt-0.5 px-2 py-1.5 rounded border border-border bg-background text-sm text-foreground"
+        />
+      </div>
+
+      <div>
+        <label htmlFor="am-album" className="text-xs text-muted-foreground">
+          {s.album}
+        </label>
+        <input
+          id="am-album"
+          type="text"
+          maxLength={500}
+          value={album}
+          onChange={(e) => setAlbum(e.target.value)}
+          className="w-full mt-0.5 px-2 py-1.5 rounded border border-border bg-background text-sm text-foreground"
+        />
+      </div>
+
+      {error && <p className="text-xs text-red-500">{error}</p>}
+
+      {processing ? (
+        <ProgressCard
+          active={processing}
+          phase={progress.phase === "idle" ? "uploading" : progress.phase}
+          label={s.progressLabel}
+          stage={progress.stage}
+          percent={progress.percent}
+          elapsed={progress.elapsed}
+        />
+      ) : (
+        <button
+          type="button"
+          data-testid="audio-metadata-submit"
+          onClick={handleProcess}
+          disabled={!hasFile || processing}
+          className="w-full py-2.5 rounded-lg bg-primary text-primary-foreground font-medium disabled:opacity-50 disabled:cursor-not-allowed"
+        >
+          {hasMultiple ? format(s.submitBatch, { count: files.length }) : s.submit}
+        </button>
+      )}
+    </div>
+  );
+}
diff --git a/apps/web/src/components/tools/audio-speed-settings.tsx b/apps/web/src/components/tools/audio-speed-settings.tsx
new file mode 100644
index 00000000..ddd682b8
--- /dev/null
+++ b/apps/web/src/components/tools/audio-speed-settings.tsx
@@ -0,0 +1,71 @@
+import { useState } from "react";
+import { ProgressCard } from "@/components/common/progress-card";
+import { useTranslation } from "@/contexts/i18n-context";
+import { useToolProcessor } from "@/hooks/use-tool-processor";
+import { format } from "@/lib/format";
+import { useFileStore } from "@/stores/file-store";
+
+export function AudioSpeedSettings() {
+  const { t } = useTranslation();
+  const s = t.toolSettings["audio-speed"];
+  const { files } = useFileStore();
+  const { processFiles, processAllFiles, processing, error, progress } =
+    useToolProcessor("audio-speed");
+
+  const [factor, setFactor] = useState(1.5);
+
+  const hasFile = files.length > 0;
+  const hasMultiple = files.length > 1;
+
+  const handleProcess = () => {
+    const settings = { factor };
+    if (hasMultiple) {
+      processAllFiles(files, settings);
+    } else {
+      processFiles(files, settings);
+    }
+  };
+
+  return (
+    <div className="space-y-4">
+      <div>
+        <label htmlFor="as-factor" className="text-xs text-muted-foreground">
+          {s.factor}
+        </label>
+        <input
+          id="as-factor"
+          type="number"
+          min={0.25}
+          max={4}
+          step={0.25}
+          value={factor}
+          onChange={(e) => setFactor(Number(e.target.value))}
+          className="w-full mt-0.5 px-2 py-1.5 rounded border border-border bg-background text-sm text-foreground"
+        />
+      </div>
+
+      {error && <p className="text-xs text-red-500">{error}</p>}
+
+      {processing ? (
+        <ProgressCard
+          active={processing}
+          phase={progress.phase === "idle" ? "uploading" : progress.phase}
+          label={s.progressLabel}
+          stage={progress.stage}
+          percent={progress.percent}
+          elapsed={progress.elapsed}
+        />
+      ) : (
+        <button
+          type="button"
+          data-testid="audio-speed-submit"
+          onClick={handleProcess}
+          disabled={!hasFile || processing}
+          className="w-full py-2.5 rounded-lg bg-primary text-primary-foreground font-medium disabled:opacity-50 disabled:cursor-not-allowed"
+        >
+          {hasMultiple ? format(s.submitBatch, { count: files.length }) : s.submit}
+        </button>
+      )}
+    </div>
+  );
+}
diff --git a/apps/web/src/components/tools/fade-audio-settings.tsx b/apps/web/src/components/tools/fade-audio-settings.tsx
new file mode 100644
index 00000000..88cbd73e
--- /dev/null
+++ b/apps/web/src/components/tools/fade-audio-settings.tsx
@@ -0,0 +1,88 @@
+import { useState } from "react";
+import { ProgressCard } from "@/components/common/progress-card";
+import { useTranslation } from "@/contexts/i18n-context";
+import { useToolProcessor } from "@/hooks/use-tool-processor";
+import { format } from "@/lib/format";
+import { useFileStore } from "@/stores/file-store";
+
+export function FadeAudioSettings() {
+  const { t } = useTranslation();
+  const s = t.toolSettings["fade-audio"];
+  const { files } = useFileStore();
+  const { processFiles, processAllFiles, processing, error, progress } =
+    useToolProcessor("fade-audio");
+
+  const [fadeInS, setFadeInS] = useState(1);
+  const [fadeOutS, setFadeOutS] = useState(1);
+
+  const hasFile = files.length > 0;
+  const hasMultiple = files.length > 1;
+
+  const handleProcess = () => {
+    const settings = { fadeInS, fadeOutS };
+    if (hasMultiple) {
+      processAllFiles(files, settings);
+    } else {
+      processFiles(files, settings);
+    }
+  };
+
+  return (
+    <div className="space-y-4">
+      <div>
+        <label htmlFor="fa-fadein" className="text-xs text-muted-foreground">
+          {s["fade-in-s"]}
+        </label>
+        <input
+          id="fa-fadein"
+          type="number"
+          min={0}
+          max={30}
+          step={0.5}
+          value={fadeInS}
+          onChange={(e) => setFadeInS(Number(e.target.value))}
+          className="w-full mt-0.5 px-2 py-1.5 rounded border border-border bg-background text-sm text-foreground"
+        />
+      </div>
+
+      <div>
+        <label htmlFor="fa-fadeout" className="text-xs text-muted-foreground">
+          {s["fade-out-s"]}
+        </label>
+        <input
+          id="fa-fadeout"
+          type="number"
+          min={0}
+          max={30}
+          step={0.5}
+          value={fadeOutS}
+          onChange={(e) => setFadeOutS(Number(e.target.value))}
+          className="w-full mt-0.5 px-2 py-1.5 rounded border border-border bg-background text-sm text-foreground"
+        />
+      </div>
+
+      {error && <p className="text-xs text-red-500">{error}</p>}
+
+      {processing ? (
+        <ProgressCard
+          active={processing}
+          phase={progress.phase === "idle" ? "uploading" : progress.phase}
+          label={s.progressLabel}
+          stage={progress.stage}
+          percent={progress.percent}
+          elapsed={progress.elapsed}
+        />
+      ) : (
+        <button
+          type="button"
+          data-testid="fade-audio-submit"
+          onClick={handleProcess}
+          disabled={!hasFile || processing}
+          className="w-full py-2.5 rounded-lg bg-primary text-primary-foreground font-medium disabled:opacity-50 disabled:cursor-not-allowed"
+        >
+          {hasMultiple ? format(s.submitBatch, { count: files.length }) : s.submit}
+        </button>
+      )}
+    </div>
+  );
+}
diff --git a/apps/web/src/components/tools/merge-audio-settings.tsx b/apps/web/src/components/tools/merge-audio-settings.tsx
new file mode 100644
index 00000000..c93a4f80
--- /dev/null
+++ b/apps/web/src/components/tools/merge-audio-settings.tsx
@@ -0,0 +1,76 @@
+import { useState } from "react";
+import { ProgressCard } from "@/components/common/progress-card";
+import { useTranslation } from "@/contexts/i18n-context";
+import { useToolProcessor } from "@/hooks/use-tool-processor";
+import { format } from "@/lib/format";
+import { useFileStore } from "@/stores/file-store";
+
+type AudioFormat = "mp3" | "wav" | "flac" | "m4a";
+
+export function MergeAudioSettings() {
+  const { t } = useTranslation();
+  const s = t.toolSettings["merge-audio"];
+  const { files } = useFileStore();
+  const { processFiles, processAllFiles, processing, error, progress } =
+    useToolProcessor("merge-audio");
+
+  const [outFormat, setOutFormat] = useState<AudioFormat>("mp3");
+
+  const hasFile = files.length > 0;
+  const hasMultiple = files.length > 1;
+
+  const handleProcess = () => {
+    const settings = { format: outFormat };
+    if (hasMultiple) {
+      processAllFiles(files, settings);
+    } else {
+      processFiles(files, settings);
+    }
+  };
+
+  return (
+    <div className="space-y-4">
+      <div>
+        <label htmlFor="ma-format" className="text-xs text-muted-foreground">
+          {s.format}
+        </label>
+        <select
+          id="ma-format"
+          value={outFormat}
+          onChange={(e) => setOutFormat(e.target.value as AudioFormat)}
+          className="w-full mt-0.5 px-2 py-1.5 rounded border border-border bg-background text-sm text-foreground"
+        >
+          <option value="mp3">{s.mp3}</option>
+          <option value="wav">{s.wav}</option>
+          <option value="flac">{s.flac}</option>
+          <option value="m4a">{s.m4a}</option>
+        </select>
+      </div>
+
+      <p className="text-[10px] text-muted-foreground">{s["order-hint"]}</p>
+
+      {error && <p className="text-xs text-red-500">{error}</p>}
+
+      {processing ? (
+        <ProgressCard
+          active={processing}
+          phase={progress.phase === "idle" ? "uploading" : progress.phase}
+          label={s.progressLabel}
+          stage={progress.stage}
+          percent={progress.percent}
+          elapsed={progress.elapsed}
+        />
+      ) : (
+        <button
+          type="button"
+          data-testid="merge-audio-submit"
+          onClick={handleProcess}
+          disabled={!hasFile || processing}
+          className="w-full py-2.5 rounded-lg bg-primary text-primary-foreground font-medium disabled:opacity-50 disabled:cursor-not-allowed"
+        >
+          {hasMultiple ? format(s.submitBatch, { count: files.length }) : s.submit}
+        </button>
+      )}
+    </div>
+  );
+}
diff --git a/apps/web/src/components/tools/noise-reduction-settings.tsx b/apps/web/src/components/tools/noise-reduction-settings.tsx
new file mode 100644
index 00000000..8b070525
--- /dev/null
+++ b/apps/web/src/components/tools/noise-reduction-settings.tsx
@@ -0,0 +1,73 @@
+import { useState } from "react";
+import { ProgressCard } from "@/components/common/progress-card";
+import { useTranslation } from "@/contexts/i18n-context";
+import { useToolProcessor } from "@/hooks/use-tool-processor";
+import { format } from "@/lib/format";
+import { useFileStore } from "@/stores/file-store";
+
+type Strength = "light" | "medium" | "strong";
+
+export function NoiseReductionSettings() {
+  const { t } = useTranslation();
+  const s = t.toolSettings["noise-reduction"];
+  const { files } = useFileStore();
+  const { processFiles, processAllFiles, processing, error, progress } =
+    useToolProcessor("noise-reduction");
+
+  const [strength, setStrength] = useState<Strength>("medium");
+
+  const hasFile = files.length > 0;
+  const hasMultiple = files.length > 1;
+
+  const handleProcess = () => {
+    const settings = { strength };
+    if (hasMultiple) {
+      processAllFiles(files, settings);
+    } else {
+      processFiles(files, settings);
+    }
+  };
+
+  return (
+    <div className="space-y-4">
+      <div>
+        <label htmlFor="nr-strength" className="text-xs text-muted-foreground">
+          {s.strength}
+        </label>
+        <select
+          id="nr-strength"
+          value={strength}
+          onChange={(e) => setStrength(e.target.value as Strength)}
+          className="w-full mt-0.5 px-2 py-1.5 rounded border border-border bg-background text-sm text-foreground"
+        >
+          <option value="light">{s.light}</option>
+          <option value="medium">{s.medium}</option>
+          <option value="strong">{s.strong}</option>
+        </select>
+      </div>
+
+      {error && <p className="text-xs text-red-500">{error}</p>}
+
+      {processing ? (
+        <ProgressCard
+          active={processing}
+          phase={progress.phase === "idle" ? "uploading" : progress.phase}
+          label={s.progressLabel}
+          stage={progress.stage}
+          percent={progress.percent}
+          elapsed={progress.elapsed}
+        />
+      ) : (
+        <button
+          type="button"
+          data-testid="noise-reduction-submit"
+          onClick={handleProcess}
+          disabled={!hasFile || processing}
+          className="w-full py-2.5 rounded-lg bg-primary text-primary-foreground font-medium disabled:opacity-50 disabled:cursor-not-allowed"
+        >
+          {hasMultiple ? format(s.submitBatch, { count: files.length }) : s.submit}
+        </button>
+      )}
+    </div>
+  );
+}
diff --git a/apps/web/src/components/tools/normalize-audio-settings.tsx b/apps/web/src/components/tools/normalize-audio-settings.tsx
new file mode 100644
index 00000000..46c1b3c8
--- /dev/null
+++ b/apps/web/src/components/tools/normalize-audio-settings.tsx
@@ -0,0 +1,54 @@
+import { ProgressCard } from "@/components/common/progress-card";
+import { useTranslation } from "@/contexts/i18n-context";
+import { useToolProcessor } from "@/hooks/use-tool-processor";
+import { format } from "@/lib/format";
+import { useFileStore } from "@/stores/file-store";
+
+export function NormalizeAudioSettings() {
+  const { t } = useTranslation();
+  const s = t.toolSettings["normalize-audio"];
+  const { files } = useFileStore();
+  const { processFiles, processAllFiles, processing, error, progress } =
+    useToolProcessor("normalize-audio");
+
+  const hasFile = files.length > 0;
+  const hasMultiple = files.length > 1;
+
+  const handleProcess = () => {
+    const settings = {};
+    if (hasMultiple) {
+      processAllFiles(files, settings);
+    } else {
+      processFiles(files, settings);
+    }
+  };
+
+  return (
+    <div className="space-y-4">
+      <p className="text-[10px] text-muted-foreground">{s.hint}</p>
+
+      {error && <p className="text-xs text-red-500">{error}</p>}
+
+      {processing ? (
+        <ProgressCard
+          active={processing}
+          phase={progress.phase === "idle" ? "uploading" : progress.phase}
+          label={s.progressLabel}
+          stage={progress.stage}
+          percent={progress.percent}
+          elapsed={progress.elapsed}
+        />
+      ) : (
+        <button
+          type="button"
+          data-testid="normalize-audio-submit"
+          onClick={handleProcess}
+          disabled={!hasFile || processing}
+          className="w-full py-2.5 rounded-lg bg-primary text-primary-foreground font-medium disabled:opacity-50 disabled:cursor-not-allowed"
+        >
+          {hasMultiple ? format(s.submitBatch, { count: files.length }) : s.submit}
+        </button>
+      )}
+    </div>
+  );
+}
diff --git a/apps/web/src/components/tools/pitch-shift-settings.tsx b/apps/web/src/components/tools/pitch-shift-settings.tsx
new file mode 100644
index 00000000..57ae0a45
--- /dev/null
+++ b/apps/web/src/components/tools/pitch-shift-settings.tsx
@@ -0,0 +1,72 @@
+import { useState } from "react";
+import { ProgressCard } from "@/components/common/progress-card";
+import { useTranslation } from "@/contexts/i18n-context";
+import { useToolProcessor } from "@/hooks/use-tool-processor";
+import { format } from "@/lib/format";
+import { useFileStore } from "@/stores/file-store";
+
+export function PitchShiftSettings() {
+  const { t } = useTranslation();
+  const s = t.toolSettings["pitch-shift"];
+  const { files } = useFileStore();
+  const { processFiles, processAllFiles, processing, error, progress } =
+    useToolProcessor("pitch-shift");
+
+  const [semitones, setSemitones] = useState(3);
+
+  const hasFile = files.length > 0;
+  const hasMultiple = files.length > 1;
+
+  const handleProcess = () => {
+    const settings = { semitones };
+    if (hasMultiple) {
+      processAllFiles(files, settings);
+    } else {
+      processFiles(files, settings);
+    }
+  };
+
+  return (
+    <div className="space-y-4">
+      <div>
+        <label htmlFor="ps-semi" className="text-xs text-muted-foreground">
+          {s.semitones}
+        </label>
+        <input
+          id="ps-semi"
+          type="number"
+          min={-12}
+          max={12}
+          step={1}
+          value={semitones}
+          onChange={(e) => setSemitones(Number(e.target.value))}
+          className="w-full mt-0.5 px-2 py-1.5 rounded border border-border bg-background text-sm text-foreground"
+        />
+        <p className="text-[10px] text-muted-foreground mt-0.5">{s.hint}</p>
+      </div>
+
+      {error && <p className="text-xs text-red-500">{error}</p>}
+
+      {processing ? (
+        <ProgressCard
+          active={processing}
+          phase={progress.phase === "idle" ? "uploading" : progress.phase}
+          label={s.progressLabel}
+          stage={progress.stage}
+          percent={progress.percent}
+          elapsed={progress.elapsed}
+        />
+      ) : (
+        <button
+          type="button"
+          data-testid="pitch-shift-submit"
+          onClick={handleProcess}
+          disabled={!hasFile || processing}
+          className="w-full py-2.5 rounded-lg bg-primary text-primary-foreground font-medium disabled:opacity-50 disabled:cursor-not-allowed"
+        >
+          {hasMultiple ? format(s.submitBatch, { count: files.length }) : s.submit}
+        </button>
+      )}
+    </div>
+  );
+}
diff --git a/apps/web/src/components/tools/reverse-audio-settings.tsx b/apps/web/src/components/tools/reverse-audio-settings.tsx
new file mode 100644
index 00000000..9f64236f
--- /dev/null
+++ b/apps/web/src/components/tools/reverse-audio-settings.tsx
@@ -0,0 +1,52 @@
+import { ProgressCard } from "@/components/common/progress-card";
+import { useTranslation } from "@/contexts/i18n-context";
+import { useToolProcessor } from "@/hooks/use-tool-processor";
+import { format } from "@/lib/format";
+import { useFileStore } from "@/stores/file-store";
+
+export function ReverseAudioSettings() {
+  const { t } = useTranslation();
+  const s = t.toolSettings["reverse-audio"];
+  const { files } = useFileStore();
+  const { processFiles, processAllFiles, processing, error, progress } =
+    useToolProcessor("reverse-audio");
+
+  const hasFile = files.length > 0;
+  const hasMultiple = files.length > 1;
+
+  const handleProcess = () => {
+    const settings = {};
+    if (hasMultiple) {
+      processAllFiles(files, settings);
+    } else {
+      processFiles(files, settings);
+    }
+  };
+
+  return (
+    <div className="space-y-4">
+      {error && <p className="text-xs text-red-500">{error}</p>}
+
+      {processing ? (
+        <ProgressCard
+          active={processing}
+          phase={progress.phase === "idle" ? "uploading" : progress.phase}
+          label={s.progressLabel}
+          stage={progress.stage}
+          percent={progress.percent}
+          elapsed={progress.elapsed}
+        />
+      ) : (
+        <button
+          type="button"
+          data-testid="reverse-audio-submit"
+          onClick={handleProcess}
+          disabled={!hasFile || processing}
+          className="w-full py-2.5 rounded-lg bg-primary text-primary-foreground font-medium disabled:opacity-50 disabled:cursor-not-allowed"
+        >
+          {hasMultiple ? format(s.submitBatch, { count: files.length }) : s.submit}
+        </button>
+      )}
+    </div>
+  );
+}
diff --git a/apps/web/src/components/tools/ringtone-maker-settings.tsx b/apps/web/src/components/tools/ringtone-maker-settings.tsx
new file mode 100644
index 00000000..be320af3
--- /dev/null
+++ b/apps/web/src/components/tools/ringtone-maker-settings.tsx
@@ -0,0 +1,88 @@
+import { useState } from "react";
+import { ProgressCard } from "@/components/common/progress-card";
+import { useTranslation } from "@/contexts/i18n-context";
+import { useToolProcessor } from "@/hooks/use-tool-processor";
+import { format } from "@/lib/format";
+import { useFileStore } from "@/stores/file-store";
+
+export function RingtoneMakerSettings() {
+  const { t } = useTranslation();
+  const s = t.toolSettings["ringtone-maker"];
+  const { files } = useFileStore();
+  const { processFiles, processAllFiles, processing, error, progress } =
+    useToolProcessor("ringtone-maker");
+
+  const [startS, setStartS] = useState(0);
+  const [durationS, setDurationS] = useState(30);
+
+  const hasFile = files.length > 0;
+  const hasMultiple = files.length > 1;
+
+  const handleProcess = () => {
+    const settings = { startS, durationS };
+    if (hasMultiple) {
+      processAllFiles(files, settings);
+    } else {
+      processFiles(files, settings);
+    }
+  };
+
+  return (
+    <div className="space-y-4">
+      <div>
+        <label htmlFor="rm-start" className="text-xs text-muted-foreground">
+          {s["start-s"]}
+        </label>
+        <input
+          id="rm-start"
+          type="number"
+          min={0}
+          step={0.5}
+          value={startS}
+          onChange={(e) => setStartS(Number(e.target.value))}
+          className="w-full mt-0.5 px-2 py-1.5 rounded border border-border bg-background text-sm text-foreground"
+        />
+      </div>
+
+      <div>
+        <label htmlFor="rm-duration" className="text-xs text-muted-foreground">
+          {s["duration-s"]}
+        </label>
+        <input
+          id="rm-duration"
+          type="number"
+          min={1}
+          max={30}
+          step={0.5}
+          value={durationS}
+          onChange={(e) => setDurationS(Number(e.target.value))}
+          className="w-full mt-0.5 px-2 py-1.5 rounded border border-border bg-background text-sm text-foreground"
+        />
+        <p className="text-[10px] text-muted-foreground mt-0.5">{s["max-hint"]}</p>
+      </div>
+
+      {error && <p className="text-xs text-red-500">{error}</p>}
+
+      {processing ? (
+        <ProgressCard
+          active={processing}
+          phase={progress.phase === "idle" ? "uploading" : progress.phase}
+          label={s.progressLabel}
+          stage={progress.stage}
+          percent={progress.percent}
+          elapsed={progress.elapsed}
+        />
+      ) : (
+        <button
+          type="button"
+          data-testid="ringtone-maker-submit"
+          onClick={handleProcess}
+          disabled={!hasFile || processing}
+          className="w-full py-2.5 rounded-lg bg-primary text-primary-foreground font-medium disabled:opacity-50 disabled:cursor-not-allowed"
+        >
+          {hasMultiple ? format(s.submitBatch, { count: files.length }) : s.submit}
+        </button>
+      )}
+    </div>
+  );
+}
diff --git a/apps/web/src/components/tools/silence-removal-settings.tsx b/apps/web/src/components/tools/silence-removal-settings.tsx
new file mode 100644
index 00000000..c4fa77b9
--- /dev/null
+++ b/apps/web/src/components/tools/silence-removal-settings.tsx
@@ -0,0 +1,88 @@
+import { useState } from "react";
+import { ProgressCard } from "@/components/common/progress-card";
+import { useTranslation } from "@/contexts/i18n-context";
+import { useToolProcessor } from "@/hooks/use-tool-processor";
+import { format } from "@/lib/format";
+import { useFileStore } from "@/stores/file-store";
+
+export function SilenceRemovalSettings() {
+  const { t } = useTranslation();
+  const s = t.toolSettings["silence-removal"];
+  const { files } = useFileStore();
+  const { processFiles, processAllFiles, processing, error, progress } =
+    useToolProcessor("silence-removal");
+
+  const [thresholdDb, setThresholdDb] = useState(-50);
+  const [minSilenceS, setMinSilenceS] = useState(0.5);
+
+  const hasFile = files.length > 0;
+  const hasMultiple = files.length > 1;
+
+  const handleProcess = () => {
+    const settings = { thresholdDb, minSilenceS };
+    if (hasMultiple) {
+      processAllFiles(files, settings);
+    } else {
+      processFiles(files, settings);
+    }
+  };
+
+  return (
+    <div className="space-y-4">
+      <div>
+        <label htmlFor="sr-threshold" className="text-xs text-muted-foreground">
+          {s["threshold-db"]}
+        </label>
+        <input
+          id="sr-threshold"
+          type="number"
+          min={-80}
+          max={-20}
+          step={1}
+          value={thresholdDb}
+          onChange={(e) => setThresholdDb(Number(e.target.value))}
+          className="w-full mt-0.5 px-2 py-1.5 rounded border border-border bg-background text-sm text-foreground"
+        />
+      </div>
+
+      <div>
+        <label htmlFor="sr-minsilence" className="text-xs text-muted-foreground">
+          {s["min-silence-s"]}
+        </label>
+        <input
+          id="sr-minsilence"
+          type="number"
+          min={0.1}
+          max={5}
+          step={0.1}
+          value={minSilenceS}
+          onChange={(e) => setMinSilenceS(Number(e.target.value))}
+          className="w-full mt-0.5 px-2 py-1.5 rounded border border-border bg-background text-sm text-foreground"
+        />
+      </div>
+
+      {error && <p className="text-xs text-red-500">{error}</p>}
+
+      {processing ? (
+        <ProgressCard
+          active={processing}
+          phase={progress.phase === "idle" ? "uploading" : progress.phase}
+          label={s.progressLabel}
+          stage={progress.stage}
+          percent={progress.percent}
+          elapsed={progress.elapsed}
+        />
+      ) : (
+        <button
+          type="button"
+          data-testid="silence-removal-submit"
+          onClick={handleProcess}
+          disabled={!hasFile || processing}
+          className="w-full py-2.5 rounded-lg bg-primary text-primary-foreground font-medium disabled:opacity-50 disabled:cursor-not-allowed"
+        >
+          {hasMultiple ? format(s.submitBatch, { count: files.length }) : s.submit}
+        </button>
+      )}
+    </div>
+  );
+}
diff --git a/apps/web/src/components/tools/split-audio-settings.tsx b/apps/web/src/components/tools/split-audio-settings.tsx
new file mode 100644
index 00000000..f86cc259
--- /dev/null
+++ b/apps/web/src/components/tools/split-audio-settings.tsx
@@ -0,0 +1,155 @@
+import { useState } from "react";
+import { ProgressCard } from "@/components/common/progress-card";
+import { useTranslation } from "@/contexts/i18n-context";
+import { useToolProcessor } from "@/hooks/use-tool-processor";
+import { format } from "@/lib/format";
+import { useFileStore } from "@/stores/file-store";
+
+type SplitMode = "time" | "parts" | "silence";
+
+export function SplitAudioSettings() {
+  const { t } = useTranslation();
+  const s = t.toolSettings["split-audio"];
+  const { files } = useFileStore();
+  const { processFiles, processAllFiles, processing, error, progress } =
+    useToolProcessor("split-audio");
+
+  const [mode, setMode] = useState<SplitMode>("time");
+  const [segmentS, setSegmentS] = useState(60);
+  const [parts, setParts] = useState(2);
+  const [thresholdDb, setThresholdDb] = useState(-40);
+  const [minSilenceS, setMinSilenceS] = useState(0.3);
+
+  const hasFile = files.length > 0;
+  const hasMultiple = files.length > 1;
+
+  const handleProcess = () => {
+    const settings: Record<string, unknown> = { mode };
+    if (mode === "time") settings.segmentS = segmentS;
+    if (mode === "parts") settings.parts = parts;
+    if (mode === "silence") {
+      settings.thresholdDb = thresholdDb;
+      settings.minSilenceS = minSilenceS;
+    }
+    if (hasMultiple) {
+      processAllFiles(files, settings);
+    } else {
+      processFiles(files, settings);
+    }
+  };
+
+  return (
+    <div className="space-y-4">
+      <div>
+        <label htmlFor="sa-mode" className="text-xs text-muted-foreground">
+          {s.mode}
+        </label>
+        <select
+          id="sa-mode"
+          value={mode}
+          onChange={(e) => setMode(e.target.value as SplitMode)}
+          className="w-full mt-0.5 px-2 py-1.5 rounded border border-border bg-background text-sm text-foreground"
+        >
+          <option value="time">{s.time}</option>
+          <option value="parts">{s.parts}</option>
+          <option value="silence">{s.silence}</option>
+        </select>
+      </div>
+
+      {mode === "time" && (
+        <div>
+          <label htmlFor="sa-segment" className="text-xs text-muted-foreground">
+            {s["segment-s"]}
+          </label>
+          <input
+            id="sa-segment"
+            type="number"
+            min={1}
+            max={3600}
+            step={1}
+            value={segmentS}
+            onChange={(e) => setSegmentS(Number(e.target.value))}
+            className="w-full mt-0.5 px-2 py-1.5 rounded border border-border bg-background text-sm text-foreground"
+          />
+        </div>
+      )}
+
+      {mode === "parts" && (
+        <div>
+          <label htmlFor="sa-parts" className="text-xs text-muted-foreground">
+            {s["num-parts"]}
+          </label>
+          <input
+            id="sa-parts"
+            type="number"
+            min={2}
+            max={20}
+            step={1}
+            value={parts}
+            onChange={(e) => setParts(Number(e.target.value))}
+            className="w-full mt-0.5 px-2 py-1.5 rounded border border-border bg-background text-sm text-foreground"
+          />
+        </div>
+      )}
+
+      {mode === "silence" && (
+        <>
+          <div>
+            <label htmlFor="sa-threshold" className="text-xs text-muted-foreground">
+              {s["threshold-db"]}
+            </label>
+            <input
+              id="sa-threshold"
+              type="number"
+              min={-80}
+              max={-20}
+              step={1}
+              value={thresholdDb}
+              onChange={(e) => setThresholdDb(Number(e.target.value))}
+              className="w-full mt-0.5 px-2 py-1.5 rounded border border-border bg-background text-sm text-foreground"
+            />
+          </div>
+
+          <div>
+            <label htmlFor="sa-minsilence" className="text-xs text-muted-foreground">
+              {s["min-silence-s"]}
+            </label>
+            <input
+              id="sa-minsilence"
+              type="number"
+              min={0.1}
+              max={10}
+              step={0.1}
+              value={minSilenceS}
+              onChange={(e) => setMinSilenceS(Number(e.target.value))}
+              className="w-full mt-0.5 px-2 py-1.5 rounded border border-border bg-background text-sm text-foreground"
+            />
+          </div>
+        </>
+      )}
+
+      {error && <p className="text-xs text-red-500">{error}</p>}
+
+      {processing ? (
+        <ProgressCard
+          active={processing}
+          phase={progress.phase === "idle" ? "uploading" : progress.phase}
+          label={s.progressLabel}
+          stage={progress.stage}
+          percent={progress.percent}
+          elapsed={progress.elapsed}
+        />
+      ) : (
+        <button
+          type="button"
+          data-testid="split-audio-submit"
+          onClick={handleProcess}
+          disabled={!hasFile || processing}
+          className="w-full py-2.5 rounded-lg bg-primary text-primary-foreground font-medium disabled:opacity-50 disabled:cursor-not-allowed"
+        >
+          {hasMultiple ? format(s.submitBatch, { count: files.length }) : s.submit}
+        </button>
+      )}
+    </div>
+  );
+}
diff --git a/apps/web/src/components/tools/volume-adjust-settings.tsx b/apps/web/src/components/tools/volume-adjust-settings.tsx
new file mode 100644
index 00000000..88ed83dd
--- /dev/null
+++ b/apps/web/src/components/tools/volume-adjust-settings.tsx
@@ -0,0 +1,71 @@
+import { useState } from "react";
+import { ProgressCard } from "@/components/common/progress-card";
+import { useTranslation } from "@/contexts/i18n-context";
+import { useToolProcessor } from "@/hooks/use-tool-processor";
+import { format } from "@/lib/format";
+import { useFileStore } from "@/stores/file-store";
+
+export function VolumeAdjustSettings() {
+  const { t } = useTranslation();
+  const s = t.toolSettings["volume-adjust"];
+  const { files } = useFileStore();
+  const { processFiles, processAllFiles, processing, error, progress } =
+    useToolProcessor("volume-adjust");
+
+  const [gainDb, setGainDb] = useState(3);
+
+  const hasFile = files.length > 0;
+  const hasMultiple = files.length > 1;
+
+  const handleProcess = () => {
+    const settings = { gainDb };
+    if (hasMultiple) {
+      processAllFiles(files, settings);
+    } else {
+      processFiles(files, settings);
+    }
+  };
+
+  return (
+    <div className="space-y-4">
+      <div>
+        <label htmlFor="va-gain" className="text-xs text-muted-foreground">
+          {s["gain-db"]}
+        </label>
+        <input
+          id="va-gain"
+          type="number"
+          min={-30}
+          max={30}
+          step={0.5}
+          value={gainDb}
+          onChange={(e) => setGainDb(Number(e.target.value))}
+          className="w-full mt-0.5 px-2 py-1.5 rounded border border-border bg-background text-sm text-foreground"
+        />
+      </div>
+
+      {error && <p className="text-xs text-red-500">{error}</p>}
+
+      {processing ? (
+        <ProgressCard
+          active={processing}
+          phase={progress.phase === "idle" ? "uploading" : progress.phase}
+          label={s.progressLabel}
+          stage={progress.stage}
+          percent={progress.percent}
+          elapsed={progress.elapsed}
+        />
+      ) : (
+        <button
+          type="button"
+          data-testid="volume-adjust-submit"
+          onClick={handleProcess}
+          disabled={!hasFile || processing}
+          className="w-full py-2.5 rounded-lg bg-primary text-primary-foreground font-medium disabled:opacity-50 disabled:cursor-not-allowed"
+        >
+          {hasMultiple ? format(s.submitBatch, { count: files.length }) : s.submit}
+        </button>
+      )}
+    </div>
+  );
+}
diff --git a/apps/web/src/components/tools/waveform-image-settings.tsx b/apps/web/src/components/tools/waveform-image-settings.tsx
new file mode 100644
index 00000000..5e405117
--- /dev/null
+++ b/apps/web/src/components/tools/waveform-image-settings.tsx
@@ -0,0 +1,103 @@
+import { useState } from "react";
+import { ProgressCard } from "@/components/common/progress-card";
+import { useTranslation } from "@/contexts/i18n-context";
+import { useToolProcessor } from "@/hooks/use-tool-processor";
+import { format } from "@/lib/format";
+import { useFileStore } from "@/stores/file-store";
+
+export function WaveformImageSettings() {
+  const { t } = useTranslation();
+  const s = t.toolSettings["waveform-image"];
+  const { files } = useFileStore();
+  const { processFiles, processAllFiles, processing, error, progress } =
+    useToolProcessor("waveform-image");
+
+  const [width, setWidth] = useState(1024);
+  const [height, setHeight] = useState(256);
+  const [color, setColor] = useState("#4f46e5");
+
+  const hasFile = files.length > 0;
+  const hasMultiple = files.length > 1;
+
+  const handleProcess = () => {
+    const settings = { width, height, color };
+    if (hasMultiple) {
+      processAllFiles(files, settings);
+    } else {
+      processFiles(files, settings);
+    }
+  };
+
+  return (
+    <div className="space-y-4">
+      <div>
+        <label htmlFor="wi-width" className="text-xs text-muted-foreground">
+          {s.width}
+        </label>
+        <input
+          id="wi-width"
+          type="number"
+          min={256}
+          max={3840}
+          step={1}
+          value={width}
+          onChange={(e) => setWidth(Number(e.target.value))}
+          className="w-full mt-0.5 px-2 py-1.5 rounded border border-border bg-background text-sm text-foreground"
+        />
+      </div>
+
+      <div>
+        <label htmlFor="wi-height" className="text-xs text-muted-foreground">
+          {s.height}
+        </label>
+        <input
+          id="wi-height"
+          type="number"
+          min={64}
+          max={1080}
+          step={1}
+          value={height}
+          onChange={(e) => setHeight(Number(e.target.value))}
+          className="w-full mt-0.5 px-2 py-1.5 rounded border border-border bg-background text-sm text-foreground"
+        />
+      </div>
+
+      <div>
+        <label htmlFor="wi-color" className="text-xs text-muted-foreground">
+          {s.color}
+        </label>
+        <input
+          id="wi-color"
+          type="text"
+          maxLength={7}
+          value={color}
+          onChange={(e) => setColor(e.target.value)}
+          className="w-full mt-0.5 px-2 py-1.5 rounded border border-border bg-background text-sm text-foreground"
+        />
+      </div>
+
+      {error && <p className="text-xs text-red-500">{error}</p>}
+
+      {processing ? (
+        <ProgressCard
+          active={processing}
+          phase={progress.phase === "idle" ? "uploading" : progress.phase}
+          label={s.progressLabel}
+          stage={progress.stage}
+          percent={progress.percent}
+          elapsed={progress.elapsed}
+        />
+      ) : (
+        <button
+          type="button"
+          data-testid="waveform-image-submit"
+          onClick={handleProcess}
+          disabled={!hasFile || processing}
+          className="w-full py-2.5 rounded-lg bg-primary text-primary-foreground font-medium disabled:opacity-50 disabled:cursor-not-allowed"
+        >
+          {hasMultiple ? format(s.submitBatch, { count: files.length }) : s.submit}
+        </button>
+      )}
+    </div>
+  );
+}
diff --git a/apps/web/src/lib/icon-map.ts b/apps/web/src/lib/icon-map.ts
index e372d69a..8493d7dd 100644
--- a/apps/web/src/lib/icon-map.ts
+++ b/apps/web/src/lib/icon-map.ts
@@ -1,9 +1,12 @@
 import type { LucideIcon } from "lucide-react";
 import {
+  Activity,
   Anchor,
   AppWindow,
   Archive,
   AudioLines,
+  AudioWaveform,
+  BellRing,
   BookImage,
   BookOpen,
   Braces,
@@ -57,6 +60,7 @@ import {
   MessageSquareText,
   MicVocal,
   Minimize2,
+  Music,
   Palette,
   PenLine,
   PenTool,
@@ -88,6 +92,7 @@ import {
   Volume2,
   VolumeX,
   Wand,
+  Waves,
   Wrench,
   Zap,
   ZoomIn,
@@ -96,10 +101,13 @@ import {
 // Only the icons actually used by tool definitions in @snapotter/shared constants.
 // Avoids `import * as icons from "lucide-react"` which pulls the entire 1000+ icon library.
 export const ICON_MAP: Record<string, LucideIcon> = {
+  Activity,
   Anchor,
   AppWindow,
   Archive,
   AudioLines,
+  AudioWaveform,
+  BellRing,
   BookImage,
   BookOpen,
   Braces,
@@ -152,6 +160,7 @@ export const ICON_MAP: Record<string, LucideIcon> = {
   MessageSquareText,
   MicVocal,
   Minimize2,
+  Music,
   Palette,
   PenLine,
   PenTool,
@@ -182,6 +191,7 @@ export const ICON_MAP: Record<string, LucideIcon> = {
   Volume2,
   VolumeX,
   Wand,
+  Waves,
   Wrench,
   Zap,
   ZoomIn,
diff --git a/apps/web/src/lib/tool-display-modes.ts b/apps/web/src/lib/tool-display-modes.ts
index 3af8ad6e..235670c2 100644
--- a/apps/web/src/lib/tool-display-modes.ts
+++ b/apps/web/src/lib/tool-display-modes.ts
@@ -121,9 +121,23 @@ export const TOOL_DISPLAY_MODES: Record<string, DisplayMode> = {
   "video-metadata": "no-comparison",
 
   // Audio tools
+  "audio-channels": "media-player",
+  "audio-metadata": "no-comparison",
+  "audio-speed": "media-player",
   "convert-audio": "media-player",
-  "trim-audio": "media-player",
   "extract-audio": "media-player",
+  "fade-audio": "media-player",
+  "merge-audio": "media-player",
+  "noise-reduction": "media-player",
+  "normalize-audio": "media-player",
+  "pitch-shift": "media-player",
+  "reverse-audio": "media-player",
+  "ringtone-maker": "media-player",
+  "silence-removal": "media-player",
+  "split-audio": "no-comparison",
+  "trim-audio": "media-player",
+  "volume-adjust": "media-player",
+  "waveform-image": "no-comparison",
 
   // PDF & Document tools
   "merge-pdf": "document",
@@ -165,6 +179,7 @@ export const TOOL_DISPLAY_MODES: Record<string, DisplayMode> = {
  * Consumed by use-tool-processor; backend routes declare maxInputs.
  */
 export const MULTI_FILE_TOOLS: ReadonlySet<string> = new Set([
+  "merge-audio",
   "merge-pdf",
   "merge-videos",
   "replace-audio",
diff --git a/apps/web/src/lib/tool-registry.tsx b/apps/web/src/lib/tool-registry.tsx
index 1c2b058c..ccddccd6 100644
--- a/apps/web/src/lib/tool-registry.tsx
+++ b/apps/web/src/lib/tool-registry.tsx
@@ -494,6 +494,76 @@ const ExtractAudioSettings = lazy(() =>
     default: m.ExtractAudioSettings,
   })),
 );
+const AudioChannelsSettings = lazy(() =>
+  import("@/components/tools/audio-channels-settings").then((m) => ({
+    default: m.AudioChannelsSettings,
+  })),
+);
+const AudioMetadataSettings = lazy(() =>
+  import("@/components/tools/audio-metadata-settings").then((m) => ({
+    default: m.AudioMetadataSettings,
+  })),
+);
+const AudioSpeedSettings = lazy(() =>
+  import("@/components/tools/audio-speed-settings").then((m) => ({
+    default: m.AudioSpeedSettings,
+  })),
+);
+const FadeAudioSettings = lazy(() =>
+  import("@/components/tools/fade-audio-settings").then((m) => ({
+    default: m.FadeAudioSettings,
+  })),
+);
+const MergeAudioSettings = lazy(() =>
+  import("@/components/tools/merge-audio-settings").then((m) => ({
+    default: m.MergeAudioSettings,
+  })),
+);
+const NoiseReductionSettings = lazy(() =>
+  import("@/components/tools/noise-reduction-settings").then((m) => ({
+    default: m.NoiseReductionSettings,
+  })),
+);
+const NormalizeAudioSettings = lazy(() =>
+  import("@/components/tools/normalize-audio-settings").then((m) => ({
+    default: m.NormalizeAudioSettings,
+  })),
+);
+const PitchShiftSettings = lazy(() =>
+  import("@/components/tools/pitch-shift-settings").then((m) => ({
+    default: m.PitchShiftSettings,
+  })),
+);
+const ReverseAudioSettings = lazy(() =>
+  import("@/components/tools/reverse-audio-settings").then((m) => ({
+    default: m.ReverseAudioSettings,
+  })),
+);
+const RingtoneMakerSettings = lazy(() =>
+  import("@/components/tools/ringtone-maker-settings").then((m) => ({
+    default: m.RingtoneMakerSettings,
+  })),
+);
+const SilenceRemovalSettings = lazy(() =>
+  import("@/components/tools/silence-removal-settings").then((m) => ({
+    default: m.SilenceRemovalSettings,
+  })),
+);
+const SplitAudioSettings = lazy(() =>
+  import("@/components/tools/split-audio-settings").then((m) => ({
+    default: m.SplitAudioSettings,
+  })),
+);
+const VolumeAdjustSettings = lazy(() =>
+  import("@/components/tools/volume-adjust-settings").then((m) => ({
+    default: m.VolumeAdjustSettings,
+  })),
+);
+const WaveformImageSettings = lazy(() =>
+  import("@/components/tools/waveform-image-settings").then((m) => ({
+    default: m.WaveformImageSettings,
+  })),
+);
 const MergePdfSettings = lazy(() =>
   import("@/components/tools/merge-pdf-settings").then((m) => ({
     default: m.MergePdfSettings,
@@ -809,6 +879,22 @@ const ENTRY_CONFIG: ReadonlyArray<[string, RegistryEntryConfig]> = [
   ["trim-audio", { accept: AUDIO_INPUTS.join(","), Settings: TrimAudioSettings }],
   ["extract-audio", { accept: VIDEO_INPUTS.join(","), Settings: ExtractAudioSettings }],
 
+  // Audio depth tools
+  ["audio-channels", { accept: AUDIO_INPUTS.join(","), Settings: AudioChannelsSettings }],
+  ["audio-metadata", { accept: AUDIO_INPUTS.join(","), Settings: AudioMetadataSettings }],
+  ["audio-speed", { accept: AUDIO_INPUTS.join(","), Settings: AudioSpeedSettings }],
+  ["fade-audio", { accept: AUDIO_INPUTS.join(","), Settings: FadeAudioSettings }],
+  ["merge-audio", { accept: AUDIO_INPUTS.join(","), Settings: MergeAudioSettings }],
+  ["noise-reduction", { accept: AUDIO_INPUTS.join(","), Settings: NoiseReductionSettings }],
+  ["normalize-audio", { accept: AUDIO_INPUTS.join(","), Settings: NormalizeAudioSettings }],
+  ["pitch-shift", { accept: AUDIO_INPUTS.join(","), Settings: PitchShiftSettings }],
+  ["reverse-audio", { accept: AUDIO_INPUTS.join(","), Settings: ReverseAudioSettings }],
+  ["ringtone-maker", { accept: AUDIO_INPUTS.join(","), Settings: RingtoneMakerSettings }],
+  ["silence-removal", { accept: AUDIO_INPUTS.join(","), Settings: SilenceRemovalSettings }],
+  ["split-audio", { accept: AUDIO_INPUTS.join(","), Settings: SplitAudioSettings }],
+  ["volume-adjust", { accept: AUDIO_INPUTS.join(","), Settings: VolumeAdjustSettings }],
+  ["waveform-image", { accept: AUDIO_INPUTS.join(","), Settings: WaveformImageSettings }],
+
   // PDF & Document tools
   ["merge-pdf", { accept: ".pdf", Settings: MergePdfSettings }],
   ["split-pdf", { accept: ".pdf", Settings: SplitPdfSettings }],
diff --git a/packages/media-engine/src/ffmpeg.ts b/packages/media-engine/src/ffmpeg.ts
index a98a9460..c2fd1f1a 100644
--- a/packages/media-engine/src/ffmpeg.ts
+++ b/packages/media-engine/src/ffmpeg.ts
@@ -13,12 +13,14 @@ const STDERR_RING_MAX = 16 * 1024;
 /**
  * Runs ffmpeg with `-progress pipe:1` appended, parsing progress blocks from
  * stdout. Rejects with the tail of stderr on non-zero exit, timeout or abort.
- * Output must go to a FILE path in args (no stdout piping of media data).
+ * Resolves with the captured stderr tail (filters like silencedetect report
+ * there). Output must go to a FILE path in args (no stdout piping of media
+ * data).
  */
-export async function runFfmpeg(args: string[], opts: RunFfmpegOptions = {}): Promise<void> {
+export async function runFfmpeg(args: string[], opts: RunFfmpegOptions = {}): Promise<string> {
   const bin = resolveFfmpeg();
   if (!bin) throw new Error("ffmpeg binary not found (set FFMPEG_PATH or install ffmpeg)");
-  await new Promise<void>((resolvePromise, reject) => {
+  return new Promise<string>((resolvePromise, reject) => {
     const child = spawn(bin, ["-hide_banner", "-nostdin", "-y", ...args, "-progress", "pipe:1"], {
       stdio: ["ignore", "pipe", "pipe"],
     });
@@ -73,7 +75,7 @@ export async function runFfmpeg(args: string[], opts: RunFfmpegOptions = {}): Pr
       if (settled) return;
       settled = true;
       cleanup();
-      if (code === 0) resolvePromise();
+      if (code === 0) resolvePromise(stderrTail);
       else reject(new Error(`ffmpeg exited ${code ?? signal}: ${stderrTail.slice(-2000)}`));
     });
   });
diff --git a/packages/media-engine/src/ffprobe.ts b/packages/media-engine/src/ffprobe.ts
index b550ad40..f93b0149 100644
--- a/packages/media-engine/src/ffprobe.ts
+++ b/packages/media-engine/src/ffprobe.ts
@@ -7,6 +7,7 @@ export interface MediaStreamInfo {
   width?: number;
   height?: number;
   sampleRate?: number;
+  channels?: number;
 }
 
 export interface MediaInfo {
@@ -14,6 +15,7 @@ export interface MediaInfo {
   durationS: number | null;
   bitrateKbps: number | null;
   streams: MediaStreamInfo[];
+  tags?: Record<string, string>;
 }
 
 export interface ProbeOptions {
@@ -70,17 +72,28 @@ export async function probeMedia(filePath: string, opts: ProbeOptions = {}): Pro
     });
   });
   const parsed = JSON.parse(stdout) as {
-    format?: { format_name?: string; duration?: string; bit_rate?: string };
+    format?: {
+      format_name?: string;
+      duration?: string;
+      bit_rate?: string;
+      tags?: Record<string, unknown>;
+    };
     streams?: Array<{
       codec_type?: string;
       codec_name?: string;
       width?: number;
       height?: number;
       sample_rate?: string;
+      channels?: number;
     }>;
   };
   const duration = parsed.format?.duration ? Number(parsed.format.duration) : null;
   const bitRate = parsed.format?.bit_rate ? Number(parsed.format.bit_rate) : null;
+  const rawTags = (parsed.format?.tags ?? {}) as Record<string, unknown>;
+  const tags: Record<string, string> = {};
+  for (const [k, v] of Object.entries(rawTags)) {
+    if (typeof v === "string" && v.length > 0) tags[k.toLowerCase()] = v;
+  }
   return {
     container: parsed.format?.format_name ?? "unknown",
     durationS: Number.isFinite(duration as number) ? (duration as number) : null,
@@ -93,7 +106,9 @@ export async function probeMedia(filePath: string, opts: ProbeOptions = {}): Pro
         width: s.width,
         height: s.height,
         sampleRate: Number.isFinite(sr) && (sr as number) > 0 ? sr : undefined,
+        channels: typeof s.channels === "number" && s.channels > 0 ? s.channels : undefined,
       } as MediaStreamInfo;
     }),
+    tags: Object.keys(tags).length > 0 ? tags : undefined,
   };
 }
diff --git a/packages/shared/src/constants.ts b/packages/shared/src/constants.ts
index 728dea74..b9265d14 100644
--- a/packages/shared/src/constants.ts
+++ b/packages/shared/src/constants.ts
@@ -942,6 +942,160 @@ export const TOOLS: Tool[] = [
     acceptedInputs: VIDEO_INPUTS,
     executionHint: "fast",
   },
+  {
+    id: "volume-adjust",
+    name: "Volume Adjust",
+    description: "Increase or decrease audio volume by a fixed gain",
+    category: "audio",
+    icon: "Volume2",
+    route: "/volume-adjust",
+    modality: "audio",
+    acceptedInputs: AUDIO_INPUTS,
+    executionHint: "fast",
+  },
+  {
+    id: "normalize-audio",
+    name: "Normalize Audio",
+    description: "Even out loudness to broadcast standard levels",
+    category: "audio",
+    icon: "AudioWaveform",
+    route: "/normalize-audio",
+    modality: "audio",
+    acceptedInputs: AUDIO_INPUTS,
+    executionHint: "fast",
+  },
+  {
+    id: "fade-audio",
+    name: "Fade Audio",
+    description: "Add fade-in and fade-out effects to audio",
+    category: "audio",
+    icon: "Waves",
+    route: "/fade-audio",
+    modality: "audio",
+    acceptedInputs: AUDIO_INPUTS,
+    executionHint: "fast",
+  },
+  {
+    id: "reverse-audio",
+    name: "Reverse Audio",
+    description: "Play audio backwards",
+    category: "audio",
+    icon: "Rewind",
+    route: "/reverse-audio",
+    modality: "audio",
+    acceptedInputs: AUDIO_INPUTS,
+    executionHint: "fast",
+  },
+  {
+    id: "audio-speed",
+    name: "Audio Speed",
+    description: "Speed up or slow down audio playback",
+    category: "audio",
+    icon: "FastForward",
+    route: "/audio-speed",
+    modality: "audio",
+    acceptedInputs: AUDIO_INPUTS,
+    executionHint: "fast",
+  },
+  {
+    id: "pitch-shift",
+    name: "Pitch Shift",
+    description: "Raise or lower pitch by semitones without changing speed",
+    category: "audio",
+    icon: "Music",
+    route: "/pitch-shift",
+    modality: "audio",
+    acceptedInputs: AUDIO_INPUTS,
+    executionHint: "fast",
+  },
+  {
+    id: "audio-channels",
+    name: "Audio Channels",
+    description: "Convert between mono, stereo, or swap left and right channels",
+    category: "audio",
+    icon: "Split",
+    route: "/audio-channels",
+    modality: "audio",
+    acceptedInputs: AUDIO_INPUTS,
+    executionHint: "fast",
+  },
+  {
+    id: "silence-removal",
+    name: "Silence Removal",
+    description: "Strip silent sections from audio",
+    category: "audio",
+    icon: "VolumeX",
+    route: "/silence-removal",
+    modality: "audio",
+    acceptedInputs: AUDIO_INPUTS,
+    executionHint: "fast",
+  },
+  {
+    id: "noise-reduction",
+    name: "Noise Reduction",
+    description: "Reduce background noise with FFT-based denoising",
+    category: "audio",
+    icon: "Sparkles",
+    route: "/noise-reduction",
+    modality: "audio",
+    acceptedInputs: AUDIO_INPUTS,
+    executionHint: "fast",
+  },
+  {
+    id: "merge-audio",
+    name: "Merge Audio",
+    description: "Combine multiple audio files into one",
+    category: "audio",
+    icon: "Combine",
+    route: "/merge-audio",
+    modality: "audio",
+    acceptedInputs: AUDIO_INPUTS,
+    executionHint: "fast",
+  },
+  {
+    id: "split-audio",
+    name: "Split Audio",
+    description: "Split audio by time, equal parts, or silence detection",
+    category: "audio",
+    icon: "Scissors",
+    route: "/split-audio",
+    modality: "audio",
+    acceptedInputs: AUDIO_INPUTS,
+    executionHint: "fast",
+  },
+  {
+    id: "ringtone-maker",
+    name: "Ringtone Maker",
+    description: "Create a ringtone clip from any audio file",
+    category: "audio",
+    icon: "BellRing",
+    route: "/ringtone-maker",
+    modality: "audio",
+    acceptedInputs: AUDIO_INPUTS,
+    executionHint: "fast",
+  },
+  {
+    id: "waveform-image",
+    name: "Waveform Image",
+    description: "Generate a waveform visualization as a PNG image",
+    category: "audio",
+    icon: "Activity",
+    route: "/waveform-image",
+    modality: "audio",
+    acceptedInputs: AUDIO_INPUTS,
+    executionHint: "fast",
+  },
+  {
+    id: "audio-metadata",
+    name: "Audio Metadata",
+    description: "View, edit, or strip audio tags (ID3)",
+    category: "audio",
+    icon: "Tags",
+    route: "/audio-metadata",
+    modality: "audio",
+    acceptedInputs: AUDIO_INPUTS,
+    executionHint: "fast",
+  },
   // PDF & Documents
   {
     id: "merge-pdf",
diff --git a/packages/shared/src/i18n/ar.ts b/packages/shared/src/i18n/ar.ts
index 55a745bd..6a62de40 100644
--- a/packages/shared/src/i18n/ar.ts
+++ b/packages/shared/src/i18n/ar.ts
@@ -396,6 +396,62 @@ export const ar: TranslationKeys = {
       name: "Extract Audio",
       description: "Pull the audio track out of a video",
     },
+    "volume-adjust": {
+      name: "Volume Adjust",
+      description: "Increase or decrease audio volume by a fixed gain",
+    },
+    "normalize-audio": {
+      name: "Normalize Audio",
+      description: "Even out loudness to broadcast standard levels",
+    },
+    "fade-audio": {
+      name: "Fade Audio",
+      description: "Add fade-in and fade-out effects to audio",
+    },
+    "reverse-audio": {
+      name: "Reverse Audio",
+      description: "Play audio backwards",
+    },
+    "audio-speed": {
+      name: "Audio Speed",
+      description: "Speed up or slow down audio playback",
+    },
+    "pitch-shift": {
+      name: "Pitch Shift",
+      description: "Raise or lower pitch by semitones without changing speed",
+    },
+    "audio-channels": {
+      name: "Audio Channels",
+      description: "Convert between mono, stereo, or swap left and right channels",
+    },
+    "silence-removal": {
+      name: "Silence Removal",
+      description: "Strip silent sections from audio",
+    },
+    "noise-reduction": {
+      name: "Noise Reduction",
+      description: "Reduce background noise with FFT-based denoising",
+    },
+    "merge-audio": {
+      name: "Merge Audio",
+      description: "Combine multiple audio files into one",
+    },
+    "split-audio": {
+      name: "Split Audio",
+      description: "Split audio by time, equal parts, or silence detection",
+    },
+    "ringtone-maker": {
+      name: "Ringtone Maker",
+      description: "Create a ringtone clip from any audio file",
+    },
+    "waveform-image": {
+      name: "Waveform Image",
+      description: "Generate a waveform visualization as a PNG image",
+    },
+    "audio-metadata": {
+      name: "Audio Metadata",
+      description: "View, edit, or strip audio tags (ID3)",
+    },
     "merge-pdf": {
       name: "Merge PDFs",
       description: "Combine multiple PDFs into one",
@@ -1708,6 +1764,117 @@ export const ar: TranslationKeys = {
       submitBatch: "Extract ({count} files)",
       progressLabel: "Extracting",
     },
+    "volume-adjust": {
+      "gain-db": "Gain (dB)",
+      submit: "Adjust Volume",
+      submitBatch: "Adjust Volume ({count} files)",
+      progressLabel: "Adjusting volume",
+    },
+    "normalize-audio": {
+      hint: "EBU R128 loudness normalization",
+      submit: "Normalize",
+      submitBatch: "Normalize ({count} files)",
+      progressLabel: "Normalizing",
+    },
+    "fade-audio": {
+      "fade-in-s": "Fade in (seconds)",
+      "fade-out-s": "Fade out (seconds)",
+      submit: "Apply Fade",
+      submitBatch: "Apply Fade ({count} files)",
+      progressLabel: "Applying fade",
+    },
+    "reverse-audio": {
+      submit: "Reverse",
+      submitBatch: "Reverse ({count} files)",
+      progressLabel: "Reversing",
+    },
+    "audio-speed": {
+      factor: "Speed factor",
+      submit: "Change Speed",
+      submitBatch: "Change Speed ({count} files)",
+      progressLabel: "Changing speed",
+    },
+    "pitch-shift": {
+      semitones: "Semitones",
+      hint: "0 semitones is not allowed",
+      submit: "Shift Pitch",
+      submitBatch: "Shift Pitch ({count} files)",
+      progressLabel: "Shifting pitch",
+    },
+    "audio-channels": {
+      mode: "Channel mode",
+      "stereo-to-mono": "Stereo to mono",
+      "mono-to-stereo": "Mono to stereo",
+      swap: "Swap left/right",
+      submit: "Convert Channels",
+      submitBatch: "Convert Channels ({count} files)",
+      progressLabel: "Converting channels",
+    },
+    "silence-removal": {
+      "threshold-db": "Silence threshold (dB)",
+      "min-silence-s": "Minimum silence duration (seconds)",
+      submit: "Remove Silence",
+      submitBatch: "Remove Silence ({count} files)",
+      progressLabel: "Removing silence",
+    },
+    "noise-reduction": {
+      strength: "Strength",
+      light: "Light",
+      medium: "Medium",
+      strong: "Strong",
+      submit: "Reduce Noise",
+      submitBatch: "Reduce Noise ({count} files)",
+      progressLabel: "Reducing noise",
+    },
+    "merge-audio": {
+      format: "Output format",
+      mp3: "MP3",
+      wav: "WAV",
+      flac: "FLAC",
+      m4a: "M4A",
+      "order-hint": "Files will be joined in upload order",
+      submit: "Merge Audio",
+      submitBatch: "Merge Audio ({count} files)",
+      progressLabel: "Merging audio",
+    },
+    "split-audio": {
+      mode: "Split mode",
+      time: "By time",
+      parts: "Equal parts",
+      silence: "By silence",
+      "segment-s": "Segment length (seconds)",
+      "num-parts": "Number of parts",
+      "threshold-db": "Silence threshold (dB)",
+      "min-silence-s": "Minimum silence duration (seconds)",
+      submit: "Split Audio",
+      submitBatch: "Split Audio ({count} files)",
+      progressLabel: "Splitting audio",
+    },
+    "ringtone-maker": {
+      "start-s": "Start time (seconds)",
+      "duration-s": "Duration (seconds)",
+      "max-hint": "Maximum 30 seconds",
+      submit: "Create Ringtone",
+      submitBatch: "Create Ringtone ({count} files)",
+      progressLabel: "Creating ringtone",
+    },
+    "waveform-image": {
+      width: "Width (px)",
+      height: "Height (px)",
+      color: "Waveform color",
+      submit: "Generate Waveform",
+      submitBatch: "Generate Waveform ({count} files)",
+      progressLabel: "Generating waveform",
+    },
+    "audio-metadata": {
+      strip: "Strip all metadata",
+      title: "Title",
+      artist: "Artist",
+      album: "Album",
+      submit: "Apply Metadata",
+      submitBatch: "Apply Metadata ({count} files)",
+      progressLabel: "Applying metadata",
+    },
     "merge-pdf": {
       addFiles: "Add PDFs to merge",
       needTwo: "At least two PDFs are required",
diff --git a/packages/shared/src/i18n/de.ts b/packages/shared/src/i18n/de.ts
index 23e1accc..d5fd95f5 100644
--- a/packages/shared/src/i18n/de.ts
+++ b/packages/shared/src/i18n/de.ts
@@ -401,6 +401,62 @@ export const de: TranslationKeys = {
       name: "Extract Audio",
       description: "Pull the audio track out of a video",
     },
+    "volume-adjust": {
+      name: "Volume Adjust",
+      description: "Increase or decrease audio volume by a fixed gain",
+    },
+    "normalize-audio": {
+      name: "Normalize Audio",
+      description: "Even out loudness to broadcast standard levels",
+    },
+    "fade-audio": {
+      name: "Fade Audio",
+      description: "Add fade-in and fade-out effects to audio",
+    },
+    "reverse-audio": {
+      name: "Reverse Audio",
+      description: "Play audio backwards",
+    },
+    "audio-speed": {
+      name: "Audio Speed",
+      description: "Speed up or slow down audio playback",
+    },
+    "pitch-shift": {
+      name: "Pitch Shift",
+      description: "Raise or lower pitch by semitones without changing speed",
+    },
+    "audio-channels": {
+      name: "Audio Channels",
+      description: "Convert between mono, stereo, or swap left and right channels",
+    },
+    "silence-removal": {
+      name: "Silence Removal",
+      description: "Strip silent sections from audio",
+    },
+    "noise-reduction": {
+      name: "Noise Reduction",
+      description: "Reduce background noise with FFT-based denoising",
+    },
+    "merge-audio": {
+      name: "Merge Audio",
+      description: "Combine multiple audio files into one",
+    },
+    "split-audio": {
+      name: "Split Audio",
+      description: "Split audio by time, equal parts, or silence detection",
+    },
+    "ringtone-maker": {
+      name: "Ringtone Maker",
+      description: "Create a ringtone clip from any audio file",
+    },
+    "waveform-image": {
+      name: "Waveform Image",
+      description: "Generate a waveform visualization as a PNG image",
+    },
+    "audio-metadata": {
+      name: "Audio Metadata",
+      description: "View, edit, or strip audio tags (ID3)",
+    },
     "merge-pdf": {
       name: "Merge PDFs",
       description: "Combine multiple PDFs into one",
@@ -1721,6 +1777,117 @@ export const de: TranslationKeys = {
       submitBatch: "Extract ({count} files)",
       progressLabel: "Extracting",
     },
+    "volume-adjust": {
+      "gain-db": "Gain (dB)",
+      submit: "Adjust Volume",
+      submitBatch: "Adjust Volume ({count} files)",
+      progressLabel: "Adjusting volume",
+    },
+    "normalize-audio": {
+      hint: "EBU R128 loudness normalization",
+      submit: "Normalize",
+      submitBatch: "Normalize ({count} files)",
+      progressLabel: "Normalizing",
+    },
+    "fade-audio": {
+      "fade-in-s": "Fade in (seconds)",
+      "fade-out-s": "Fade out (seconds)",
+      submit: "Apply Fade",
+      submitBatch: "Apply Fade ({count} files)",
+      progressLabel: "Applying fade",
+    },
+    "reverse-audio": {
+      submit: "Reverse",
+      submitBatch: "Reverse ({count} files)",
+      progressLabel: "Reversing",
+    },
+    "audio-speed": {
+      factor: "Speed factor",
+      submit: "Change Speed",
+      submitBatch: "Change Speed ({count} files)",
+      progressLabel: "Changing speed",
+    },
+    "pitch-shift": {
+      semitones: "Semitones",
+      hint: "0 semitones is not allowed",
+      submit: "Shift Pitch",
+      submitBatch: "Shift Pitch ({count} files)",
+      progressLabel: "Shifting pitch",
+    },
+    "audio-channels": {
+      mode: "Channel mode",
+      "stereo-to-mono": "Stereo to mono",
+      "mono-to-stereo": "Mono to stereo",
+      swap: "Swap left/right",
+      submit: "Convert Channels",
+      submitBatch: "Convert Channels ({count} files)",
+      progressLabel: "Converting channels",
+    },
+    "silence-removal": {
+      "threshold-db": "Silence threshold (dB)",
+      "min-silence-s": "Minimum silence duration (seconds)",
+      submit: "Remove Silence",
+      submitBatch: "Remove Silence ({count} files)",
+      progressLabel: "Removing silence",
+    },
+    "noise-reduction": {
+      strength: "Strength",
+      light: "Light",
+      medium: "Medium",
+      strong: "Strong",
+      submit: "Reduce Noise",
+      submitBatch: "Reduce Noise ({count} files)",
+      progressLabel: "Reducing noise",
+    },
+    "merge-audio": {
+      format: "Output format",
+      mp3: "MP3",
+      wav: "WAV",
+      flac: "FLAC",
+      m4a: "M4A",
+      "order-hint": "Files will be joined in upload order",
+      submit: "Merge Audio",
+      submitBatch: "Merge Audio ({count} files)",
+      progressLabel: "Merging audio",
+    },
+    "split-audio": {
+      mode: "Split mode",
+      time: "By time",
+      parts: "Equal parts",
+      silence: "By silence",
+      "segment-s": "Segment length (seconds)",
+      "num-parts": "Number of parts",
+      "threshold-db": "Silence threshold (dB)",
+      "min-silence-s": "Minimum silence duration (seconds)",
+      submit: "Split Audio",
+      submitBatch: "Split Audio ({count} files)",
+      progressLabel: "Splitting audio",
+    },
+    "ringtone-maker": {
+      "start-s": "Start time (seconds)",
+      "duration-s": "Duration (seconds)",
+      "max-hint": "Maximum 30 seconds",
+      submit: "Create Ringtone",
+      submitBatch: "Create Ringtone ({count} files)",
+      progressLabel: "Creating ringtone",
+    },
+    "waveform-image": {
+      width: "Width (px)",
+      height: "Height (px)",
+      color: "Waveform color",
+      submit: "Generate Waveform",
+      submitBatch: "Generate Waveform ({count} files)",
+      progressLabel: "Generating waveform",
+    },
+    "audio-metadata": {
+      strip: "Strip all metadata",
+      title: "Title",
+      artist: "Artist",
+      album: "Album",
+      submit: "Apply Metadata",
+      submitBatch: "Apply Metadata ({count} files)",
+      progressLabel: "Applying metadata",
+    },
     "merge-pdf": {
       addFiles: "Add PDFs to merge",
       needTwo: "At least two PDFs are required",
diff --git a/packages/shared/src/i18n/en.ts b/packages/shared/src/i18n/en.ts
index 2535e7fc..2566ceea 100644
--- a/packages/shared/src/i18n/en.ts
+++ b/packages/shared/src/i18n/en.ts
@@ -356,6 +356,62 @@ export const en = {
       name: "Extract Audio",
       description: "Pull the audio track out of a video",
     },
+    "volume-adjust": {
+      name: "Volume Adjust",
+      description: "Increase or decrease audio volume by a fixed gain",
+    },
+    "normalize-audio": {
+      name: "Normalize Audio",
+      description: "Even out loudness to broadcast standard levels",
+    },
+    "fade-audio": {
+      name: "Fade Audio",
+      description: "Add fade-in and fade-out effects to audio",
+    },
+    "reverse-audio": {
+      name: "Reverse Audio",
+      description: "Play audio backwards",
+    },
+    "audio-speed": {
+      name: "Audio Speed",
+      description: "Speed up or slow down audio playback",
+    },
+    "pitch-shift": {
+      name: "Pitch Shift",
+      description: "Raise or lower pitch by semitones without changing speed",
+    },
+    "audio-channels": {
+      name: "Audio Channels",
+      description: "Convert between mono, stereo, or swap left and right channels",
+    },
+    "silence-removal": {
+      name: "Silence Removal",
+      description: "Strip silent sections from audio",
+    },
+    "noise-reduction": {
+      name: "Noise Reduction",
+      description: "Reduce background noise with FFT-based denoising",
+    },
+    "merge-audio": {
+      name: "Merge Audio",
+      description: "Combine multiple audio files into one",
+    },
+    "split-audio": {
+      name: "Split Audio",
+      description: "Split audio by time, equal parts, or silence detection",
+    },
+    "ringtone-maker": {
+      name: "Ringtone Maker",
+      description: "Create a ringtone clip from any audio file",
+    },
+    "waveform-image": {
+      name: "Waveform Image",
+      description: "Generate a waveform visualization as a PNG image",
+    },
+    "audio-metadata": {
+      name: "Audio Metadata",
+      description: "View, edit, or strip audio tags (ID3)",
+    },
     "merge-pdf": {
       name: "Merge PDFs",
       description: "Combine multiple PDFs into one",
@@ -1666,6 +1722,117 @@ export const en = {
       submitBatch: "Extract ({count} files)",
       progressLabel: "Extracting",
     },
+    "volume-adjust": {
+      "gain-db": "Gain (dB)",
+      submit: "Adjust Volume",
+      submitBatch: "Adjust Volume ({count} files)",
+      progressLabel: "Adjusting volume",
+    },
+    "normalize-audio": {
+      hint: "EBU R128 loudness normalization",
+      submit: "Normalize",
+      submitBatch: "Normalize ({count} files)",
+      progressLabel: "Normalizing",
+    },
+    "fade-audio": {
+      "fade-in-s": "Fade in (seconds)",
+      "fade-out-s": "Fade out (seconds)",
+      submit: "Apply Fade",
+      submitBatch: "Apply Fade ({count} files)",
+      progressLabel: "Applying fade",
+    },
+    "reverse-audio": {
+      submit: "Reverse",
+      submitBatch: "Reverse ({count} files)",
+      progressLabel: "Reversing",
+    },
+    "audio-speed": {
+      factor: "Speed factor",
+      submit: "Change Speed",
+      submitBatch: "Change Speed ({count} files)",
+      progressLabel: "Changing speed",
+    },
+    "pitch-shift": {
+      semitones: "Semitones",
+      hint: "0 semitones is not allowed",
+      submit: "Shift Pitch",
+      submitBatch: "Shift Pitch ({count} files)",
+      progressLabel: "Shifting pitch",
+    },
+    "audio-channels": {
+      mode: "Channel mode",
+      "stereo-to-mono": "Stereo to mono",
+      "mono-to-stereo": "Mono to stereo",
+      swap: "Swap left/right",
+      submit: "Convert Channels",
+      submitBatch: "Convert Channels ({count} files)",
+      progressLabel: "Converting channels",
+    },
+    "silence-removal": {
+      "threshold-db": "Silence threshold (dB)",
+      "min-silence-s": "Minimum silence duration (seconds)",
+      submit: "Remove Silence",
+      submitBatch: "Remove Silence ({count} files)",
+      progressLabel: "Removing silence",
+    },
+    "noise-reduction": {
+      strength: "Strength",
+      light: "Light",
+      medium: "Medium",
+      strong: "Strong",
+      submit: "Reduce Noise",
+      submitBatch: "Reduce Noise ({count} files)",
+      progressLabel: "Reducing noise",
+    },
+    "merge-audio": {
+      format: "Output format",
+      mp3: "MP3",
+      wav: "WAV",
+      flac: "FLAC",
+      m4a: "M4A",
+      "order-hint": "Files will be joined in upload order",
+      submit: "Merge Audio",
+      submitBatch: "Merge Audio ({count} files)",
+      progressLabel: "Merging audio",
+    },
+    "split-audio": {
+      mode: "Split mode",
+      time: "By time",
+      parts: "Equal parts",
+      silence: "By silence",
+      "segment-s": "Segment length (seconds)",
+      "num-parts": "Number of parts",
+      "threshold-db": "Silence threshold (dB)",
+      "min-silence-s": "Minimum silence duration (seconds)",
+      submit: "Split Audio",
+      submitBatch: "Split Audio ({count} files)",
+      progressLabel: "Splitting audio",
+    },
+    "ringtone-maker": {
+      "start-s": "Start time (seconds)",
+      "duration-s": "Duration (seconds)",
+      "max-hint": "Maximum 30 seconds",
+      submit: "Create Ringtone",
+      submitBatch: "Create Ringtone ({count} files)",
+      progressLabel: "Creating ringtone",
+    },
+    "waveform-image": {
+      width: "Width (px)",
+      height: "Height (px)",
+      color: "Waveform color",
+      submit: "Generate Waveform",
+      submitBatch: "Generate Waveform ({count} files)",
+      progressLabel: "Generating waveform",
+    },
+    "audio-metadata": {
+      strip: "Strip all metadata",
+      title: "Title",
+      artist: "Artist",
+      album: "Album",
+      submit: "Apply Metadata",
+      submitBatch: "Apply Metadata ({count} files)",
+      progressLabel: "Applying metadata",
+    },
     "merge-pdf": {
       addFiles: "Add PDFs to merge",
       needTwo: "At least two PDFs are required",
diff --git a/packages/shared/src/i18n/es.ts b/packages/shared/src/i18n/es.ts
index 85762b90..78bbf8ba 100644
--- a/packages/shared/src/i18n/es.ts
+++ b/packages/shared/src/i18n/es.ts
@@ -386,6 +386,62 @@ export const es: TranslationKeys = {
       name: "Extract Audio",
       description: "Pull the audio track out of a video",
     },
+    "volume-adjust": {
+      name: "Volume Adjust",
+      description: "Increase or decrease audio volume by a fixed gain",
+    },
+    "normalize-audio": {
+      name: "Normalize Audio",
+      description: "Even out loudness to broadcast standard levels",
+    },
+    "fade-audio": {
+      name: "Fade Audio",
+      description: "Add fade-in and fade-out effects to audio",
+    },
+    "reverse-audio": {
+      name: "Reverse Audio",
+      description: "Play audio backwards",
+    },
+    "audio-speed": {
+      name: "Audio Speed",
+      description: "Speed up or slow down audio playback",
+    },
+    "pitch-shift": {
+      name: "Pitch Shift",
+      description: "Raise or lower pitch by semitones without changing speed",
+    },
+    "audio-channels": {
+      name: "Audio Channels",
+      description: "Convert between mono, stereo, or swap left and right channels",
+    },
+    "silence-removal": {
+      name: "Silence Removal",
+      description: "Strip silent sections from audio",
+    },
+    "noise-reduction": {
+      name: "Noise Reduction",
+      description: "Reduce background noise with FFT-based denoising",
+    },
+    "merge-audio": {
+      name: "Merge Audio",
+      description: "Combine multiple audio files into one",
+    },
+    "split-audio": {
+      name: "Split Audio",
+      description: "Split audio by time, equal parts, or silence detection",
+    },
+    "ringtone-maker": {
+      name: "Ringtone Maker",
+      description: "Create a ringtone clip from any audio file",
+    },
+    "waveform-image": {
+      name: "Waveform Image",
+      description: "Generate a waveform visualization as a PNG image",
+    },
+    "audio-metadata": {
+      name: "Audio Metadata",
+      description: "View, edit, or strip audio tags (ID3)",
+    },
     "merge-pdf": {
       name: "Merge PDFs",
       description: "Combine multiple PDFs into one",
@@ -1703,6 +1759,117 @@ export const es: TranslationKeys = {
       submitBatch: "Extract ({count} files)",
       progressLabel: "Extracting",
     },
+    "volume-adjust": {
+      "gain-db": "Gain (dB)",
+      submit: "Adjust Volume",
+      submitBatch: "Adjust Volume ({count} files)",
+      progressLabel: "Adjusting volume",
+    },
+    "normalize-audio": {
+      hint: "EBU R128 loudness normalization",
+      submit: "Normalize",
+      submitBatch: "Normalize ({count} files)",
+      progressLabel: "Normalizing",
+    },
+    "fade-audio": {
+      "fade-in-s": "Fade in (seconds)",
+      "fade-out-s": "Fade out (seconds)",
+      submit: "Apply Fade",
+      submitBatch: "Apply Fade ({count} files)",
+      progressLabel: "Applying fade",
+    },
+    "reverse-audio": {
+      submit: "Reverse",
+      submitBatch: "Reverse ({count} files)",
+      progressLabel: "Reversing",
+    },
+    "audio-speed": {
+      factor: "Speed factor",
+      submit: "Change Speed",
+      submitBatch: "Change Speed ({count} files)",
+      progressLabel: "Changing speed",
+    },
+    "pitch-shift": {
+      semitones: "Semitones",
+      hint: "0 semitones is not allowed",
+      submit: "Shift Pitch",
+      submitBatch: "Shift Pitch ({count} files)",
+      progressLabel: "Shifting pitch",
+    },
+    "audio-channels": {
+      mode: "Channel mode",
+      "stereo-to-mono": "Stereo to mono",
+      "mono-to-stereo": "Mono to stereo",
+      swap: "Swap left/right",
+      submit: "Convert Channels",
+      submitBatch: "Convert Channels ({count} files)",
+      progressLabel: "Converting channels",
+    },
+    "silence-removal": {
+      "threshold-db": "Silence threshold (dB)",
+      "min-silence-s": "Minimum silence duration (seconds)",
+      submit: "Remove Silence",
+      submitBatch: "Remove Silence ({count} files)",
+      progressLabel: "Removing silence",
+    },
+    "noise-reduction": {
+      strength: "Strength",
+      light: "Light",
+      medium: "Medium",
+      strong: "Strong",
+      submit: "Reduce Noise",
+      submitBatch: "Reduce Noise ({count} files)",
+      progressLabel: "Reducing noise",
+    },
+    "merge-audio": {
+      format: "Output format",
+      mp3: "MP3",
+      wav: "WAV",
+      flac: "FLAC",
+      m4a: "M4A",
+      "order-hint": "Files will be joined in upload order",
+      submit: "Merge Audio",
+      submitBatch: "Merge Audio ({count} files)",
+      progressLabel: "Merging audio",
+    },
+    "split-audio": {
+      mode: "Split mode",
+      time: "By time",
+      parts: "Equal parts",
+      silence: "By silence",
+      "segment-s": "Segment length (seconds)",
+      "num-parts": "Number of parts",
+      "threshold-db": "Silence threshold (dB)",
+      "min-silence-s": "Minimum silence duration (seconds)",
+      submit: "Split Audio",
+      submitBatch: "Split Audio ({count} files)",
+      progressLabel: "Splitting audio",
+    },
+    "ringtone-maker": {
+      "start-s": "Start time (seconds)",
+      "duration-s": "Duration (seconds)",
+      "max-hint": "Maximum 30 seconds",
+      submit: "Create Ringtone",
+      submitBatch: "Create Ringtone ({count} files)",
+      progressLabel: "Creating ringtone",
+    },
+    "waveform-image": {
+      width: "Width (px)",
+      height: "Height (px)",
+      color: "Waveform color",
+      submit: "Generate Waveform",
+      submitBatch: "Generate Waveform ({count} files)",
+      progressLabel: "Generating waveform",
+    },
+    "audio-metadata": {
+      strip: "Strip all metadata",
+      title: "Title",
+      artist: "Artist",
+      album: "Album",
+      submit: "Apply Metadata",
+      submitBatch: "Apply Metadata ({count} files)",
+      progressLabel: "Applying metadata",
+    },
     "merge-pdf": {
       addFiles: "Add PDFs to merge",
       needTwo: "At least two PDFs are required",
diff --git a/packages/shared/src/i18n/fr.ts b/packages/shared/src/i18n/fr.ts
index 496c98d1..19708e4c 100644
--- a/packages/shared/src/i18n/fr.ts
+++ b/packages/shared/src/i18n/fr.ts
@@ -402,6 +402,62 @@ export const fr: TranslationKeys = {
       name: "Extract Audio",
       description: "Pull the audio track out of a video",
     },
+    "volume-adjust": {
+      name: "Volume Adjust",
+      description: "Increase or decrease audio volume by a fixed gain",
+    },
+    "normalize-audio": {
+      name: "Normalize Audio",
+      description: "Even out loudness to broadcast standard levels",
+    },
+    "fade-audio": {
+      name: "Fade Audio",
+      description: "Add fade-in and fade-out effects to audio",
+    },
+    "reverse-audio": {
+      name: "Reverse Audio",
+      description: "Play audio backwards",
+    },
+    "audio-speed": {
+      name: "Audio Speed",
+      description: "Speed up or slow down audio playback",
+    },
+    "pitch-shift": {
+      name: "Pitch Shift",
+      description: "Raise or lower pitch by semitones without changing speed",
+    },
+    "audio-channels": {
+      name: "Audio Channels",
+      description: "Convert between mono, stereo, or swap left and right channels",
+    },
+    "silence-removal": {
+      name: "Silence Removal",
+      description: "Strip silent sections from audio",
+    },
+    "noise-reduction": {
+      name: "Noise Reduction",
+      description: "Reduce background noise with FFT-based denoising",
+    },
+    "merge-audio": {
+      name: "Merge Audio",
+      description: "Combine multiple audio files into one",
+    },
+    "split-audio": {
+      name: "Split Audio",
+      description: "Split audio by time, equal parts, or silence detection",
+    },
+    "ringtone-maker": {
+      name: "Ringtone Maker",
+      description: "Create a ringtone clip from any audio file",
+    },
+    "waveform-image": {
+      name: "Waveform Image",
+      description: "Generate a waveform visualization as a PNG image",
+    },
+    "audio-metadata": {
+      name: "Audio Metadata",
+      description: "View, edit, or strip audio tags (ID3)",
+    },
     "merge-pdf": {
       name: "Merge PDFs",
       description: "Combine multiple PDFs into one",
@@ -1722,6 +1778,117 @@ export const fr: TranslationKeys = {
       submitBatch: "Extract ({count} files)",
       progressLabel: "Extracting",
     },
+    "volume-adjust": {
+      "gain-db": "Gain (dB)",
+      submit: "Adjust Volume",
+      submitBatch: "Adjust Volume ({count} files)",
+      progressLabel: "Adjusting volume",
+    },
+    "normalize-audio": {
+      hint: "EBU R128 loudness normalization",
+      submit: "Normalize",
+      submitBatch: "Normalize ({count} files)",
+      progressLabel: "Normalizing",
+    },
+    "fade-audio": {
+      "fade-in-s": "Fade in (seconds)",
+      "fade-out-s": "Fade out (seconds)",
+      submit: "Apply Fade",
+      submitBatch: "Apply Fade ({count} files)",
+      progressLabel: "Applying fade",
+    },
+    "reverse-audio": {
+      submit: "Reverse",
+      submitBatch: "Reverse ({count} files)",
+      progressLabel: "Reversing",
+    },
+    "audio-speed": {
+      factor: "Speed factor",
+      submit: "Change Speed",
+      submitBatch: "Change Speed ({count} files)",
+      progressLabel: "Changing speed",
+    },
+    "pitch-shift": {
+      semitones: "Semitones",
+      hint: "0 semitones is not allowed",
+      submit: "Shift Pitch",
+      submitBatch: "Shift Pitch ({count} files)",
+      progressLabel: "Shifting pitch",
+    },
+    "audio-channels": {
+      mode: "Channel mode",
+      "stereo-to-mono": "Stereo to mono",
+      "mono-to-stereo": "Mono to stereo",
+      swap: "Swap left/right",
+      submit: "Convert Channels",
+      submitBatch: "Convert Channels ({count} files)",
+      progressLabel: "Converting channels",
+    },
+    "silence-removal": {
+      "threshold-db": "Silence threshold (dB)",
+      "min-silence-s": "Minimum silence duration (seconds)",
+      submit: "Remove Silence",
+      submitBatch: "Remove Silence ({count} files)",
+      progressLabel: "Removing silence",
+    },
+    "noise-reduction": {
+      strength: "Strength",
+      light: "Light",
+      medium: "Medium",
+      strong: "Strong",
+      submit: "Reduce Noise",
+      submitBatch: "Reduce Noise ({count} files)",
+      progressLabel: "Reducing noise",
+    },
+    "merge-audio": {
+      format: "Output format",
+      mp3: "MP3",
+      wav: "WAV",
+      flac: "FLAC",
+      m4a: "M4A",
+      "order-hint": "Files will be joined in upload order",
+      submit: "Merge Audio",
+      submitBatch: "Merge Audio ({count} files)",
+      progressLabel: "Merging audio",
+    },
+    "split-audio": {
+      mode: "Split mode",
+      time: "By time",
+      parts: "Equal parts",
+      silence: "By silence",
+      "segment-s": "Segment length (seconds)",
+      "num-parts": "Number of parts",
+      "threshold-db": "Silence threshold (dB)",
+      "min-silence-s": "Minimum silence duration (seconds)",
+      submit: "Split Audio",
+      submitBatch: "Split Audio ({count} files)",
+      progressLabel: "Splitting audio",
+    },
+    "ringtone-maker": {
+      "start-s": "Start time (seconds)",
+      "duration-s": "Duration (seconds)",
+      "max-hint": "Maximum 30 seconds",
+      submit: "Create Ringtone",
+      submitBatch: "Create Ringtone ({count} files)",
+      progressLabel: "Creating ringtone",
+    },
+    "waveform-image": {
+      width: "Width (px)",
+      height: "Height (px)",
+      color: "Waveform color",
+      submit: "Generate Waveform",
+      submitBatch: "Generate Waveform ({count} files)",
+      progressLabel: "Generating waveform",
+    },
+    "audio-metadata": {
+      strip: "Strip all metadata",
+      title: "Title",
+      artist: "Artist",
+      album: "Album",
+      submit: "Apply Metadata",
+      submitBatch: "Apply Metadata ({count} files)",
+      progressLabel: "Applying metadata",
+    },
     "merge-pdf": {
       addFiles: "Add PDFs to merge",
       needTwo: "At least two PDFs are required",
diff --git a/packages/shared/src/i18n/hi.ts b/packages/shared/src/i18n/hi.ts
index 65fc4bf6..b64e83ff 100644
--- a/packages/shared/src/i18n/hi.ts
+++ b/packages/shared/src/i18n/hi.ts
@@ -393,6 +393,62 @@ export const hi: TranslationKeys = {
       name: "Extract Audio",
       description: "Pull the audio track out of a video",
     },
+    "volume-adjust": {
+      name: "Volume Adjust",
+      description: "Increase or decrease audio volume by a fixed gain",
+    },
+    "normalize-audio": {
+      name: "Normalize Audio",
+      description: "Even out loudness to broadcast standard levels",
+    },
+    "fade-audio": {
+      name: "Fade Audio",
+      description: "Add fade-in and fade-out effects to audio",
+    },
+    "reverse-audio": {
+      name: "Reverse Audio",
+      description: "Play audio backwards",
+    },
+    "audio-speed": {
+      name: "Audio Speed",
+      description: "Speed up or slow down audio playback",
+    },
+    "pitch-shift": {
+      name: "Pitch Shift",
+      description: "Raise or lower pitch by semitones without changing speed",
+    },
+    "audio-channels": {
+      name: "Audio Channels",
+      description: "Convert between mono, stereo, or swap left and right channels",
+    },
+    "silence-removal": {
+      name: "Silence Removal",
+      description: "Strip silent sections from audio",
+    },
+    "noise-reduction": {
+      name: "Noise Reduction",
+      description: "Reduce background noise with FFT-based denoising",
+    },
+    "merge-audio": {
+      name: "Merge Audio",
+      description: "Combine multiple audio files into one",
+    },
+    "split-audio": {
+      name: "Split Audio",
+      description: "Split audio by time, equal parts, or silence detection",
+    },
+    "ringtone-maker": {
+      name: "Ringtone Maker",
+      description: "Create a ringtone clip from any audio file",
+    },
+    "waveform-image": {
+      name: "Waveform Image",
+      description: "Generate a waveform visualization as a PNG image",
+    },
+    "audio-metadata": {
+      name: "Audio Metadata",
+      description: "View, edit, or strip audio tags (ID3)",
+    },
     "merge-pdf": {
       name: "Merge PDFs",
       description: "Combine multiple PDFs into one",
@@ -1704,6 +1760,117 @@ export const hi: TranslationKeys = {
       submitBatch: "Extract ({count} files)",
       progressLabel: "Extracting",
     },
+    "volume-adjust": {
+      "gain-db": "Gain (dB)",
+      submit: "Adjust Volume",
+      submitBatch: "Adjust Volume ({count} files)",
+      progressLabel: "Adjusting volume",
+    },
+    "normalize-audio": {
+      hint: "EBU R128 loudness normalization",
+      submit: "Normalize",
+      submitBatch: "Normalize ({count} files)",
+      progressLabel: "Normalizing",
+    },
+    "fade-audio": {
+      "fade-in-s": "Fade in (seconds)",
+      "fade-out-s": "Fade out (seconds)",
+      submit: "Apply Fade",
+      submitBatch: "Apply Fade ({count} files)",
+      progressLabel: "Applying fade",
+    },
+    "reverse-audio": {
+      submit: "Reverse",
+      submitBatch: "Reverse ({count} files)",
+      progressLabel: "Reversing",
+    },
+    "audio-speed": {
+      factor: "Speed factor",
+      submit: "Change Speed",
+      submitBatch: "Change Speed ({count} files)",
+      progressLabel: "Changing speed",
+    },
+    "pitch-shift": {
+      semitones: "Semitones",
+      hint: "0 semitones is not allowed",
+      submit: "Shift Pitch",
+      submitBatch: "Shift Pitch ({count} files)",
+      progressLabel: "Shifting pitch",
+    },
+    "audio-channels": {
+      mode: "Channel mode",
+      "stereo-to-mono": "Stereo to mono",
+      "mono-to-stereo": "Mono to stereo",
+      swap: "Swap left/right",
+      submit: "Convert Channels",
+      submitBatch: "Convert Channels ({count} files)",
+      progressLabel: "Converting channels",
+    },
+    "silence-removal": {
+      "threshold-db": "Silence threshold (dB)",
+      "min-silence-s": "Minimum silence duration (seconds)",
+      submit: "Remove Silence",
+      submitBatch: "Remove Silence ({count} files)",
+      progressLabel: "Removing silence",
+    },
+    "noise-reduction": {
+      strength: "Strength",
+      light: "Light",
+      medium: "Medium",
+      strong: "Strong",
+      submit: "Reduce Noise",
+      submitBatch: "Reduce Noise ({count} files)",
+      progressLabel: "Reducing noise",
+    },
+    "merge-audio": {
+      format: "Output format",
+      mp3: "MP3",
+      wav: "WAV",
+      flac: "FLAC",
+      m4a: "M4A",
+      "order-hint": "Files will be joined in upload order",
+      submit: "Merge Audio",
+      submitBatch: "Merge Audio ({count} files)",
+      progressLabel: "Merging audio",
+    },
+    "split-audio": {
+      mode: "Split mode",
+      time: "By time",
+      parts: "Equal parts",
+      silence: "By silence",
+      "segment-s": "Segment length (seconds)",
+      "num-parts": "Number of parts",
+      "threshold-db": "Silence threshold (dB)",
+      "min-silence-s": "Minimum silence duration (seconds)",
+      submit: "Split Audio",
+      submitBatch: "Split Audio ({count} files)",
+      progressLabel: "Splitting audio",
+    },
+    "ringtone-maker": {
+      "start-s": "Start time (seconds)",
+      "duration-s": "Duration (seconds)",
+      "max-hint": "Maximum 30 seconds",
+      submit: "Create Ringtone",
+      submitBatch: "Create Ringtone ({count} files)",
+      progressLabel: "Creating ringtone",
+    },
+    "waveform-image": {
+      width: "Width (px)",
+      height: "Height (px)",
+      color: "Waveform color",
+      submit: "Generate Waveform",
+      submitBatch: "Generate Waveform ({count} files)",
+      progressLabel: "Generating waveform",
+    },
+    "audio-metadata": {
+      strip: "Strip all metadata",
+      title: "Title",
+      artist: "Artist",
+      album: "Album",
+      submit: "Apply Metadata",
+      submitBatch: "Apply Metadata ({count} files)",
+      progressLabel: "Applying metadata",
+    },
     "merge-pdf": {
       addFiles: "Add PDFs to merge",
       needTwo: "At least two PDFs are required",
diff --git a/packages/shared/src/i18n/id.ts b/packages/shared/src/i18n/id.ts
index 0a8f4ba6..c9ad66b3 100644
--- a/packages/shared/src/i18n/id.ts
+++ b/packages/shared/src/i18n/id.ts
@@ -401,6 +401,62 @@ export const id: TranslationKeys = {
       name: "Extract Audio",
       description: "Pull the audio track out of a video",
     },
+    "volume-adjust": {
+      name: "Volume Adjust",
+      description: "Increase or decrease audio volume by a fixed gain",
+    },
+    "normalize-audio": {
+      name: "Normalize Audio",
+      description: "Even out loudness to broadcast standard levels",
+    },
+    "fade-audio": {
+      name: "Fade Audio",
+      description: "Add fade-in and fade-out effects to audio",
+    },
+    "reverse-audio": {
+      name: "Reverse Audio",
+      description: "Play audio backwards",
+    },
+    "audio-speed": {
+      name: "Audio Speed",
+      description: "Speed up or slow down audio playback",
+    },
+    "pitch-shift": {
+      name: "Pitch Shift",
+      description: "Raise or lower pitch by semitones without changing speed",
+    },
+    "audio-channels": {
+      name: "Audio Channels",
+      description: "Convert between mono, stereo, or swap left and right channels",
+    },
+    "silence-removal": {
+      name: "Silence Removal",
+      description: "Strip silent sections from audio",
+    },
+    "noise-reduction": {
+      name: "Noise Reduction",
+      description: "Reduce background noise with FFT-based denoising",
+    },
+    "merge-audio": {
+      name: "Merge Audio",
+      description: "Combine multiple audio files into one",
+    },
+    "split-audio": {
+      name: "Split Audio",
+      description: "Split audio by time, equal parts, or silence detection",
+    },
+    "ringtone-maker": {
+      name: "Ringtone Maker",
+      description: "Create a ringtone clip from any audio file",
+    },
+    "waveform-image": {
+      name: "Waveform Image",
+      description: "Generate a waveform visualization as a PNG image",
+    },
+    "audio-metadata": {
+      name: "Audio Metadata",
+      description: "View, edit, or strip audio tags (ID3)",
+    },
     "merge-pdf": {
       name: "Merge PDFs",
       description: "Combine multiple PDFs into one",
@@ -1716,6 +1772,117 @@ export const id: TranslationKeys = {
       submitBatch: "Extract ({count} files)",
       progressLabel: "Extracting",
     },
+    "volume-adjust": {
+      "gain-db": "Gain (dB)",
+      submit: "Adjust Volume",
+      submitBatch: "Adjust Volume ({count} files)",
+      progressLabel: "Adjusting volume",
+    },
+    "normalize-audio": {
+      hint: "EBU R128 loudness normalization",
+      submit: "Normalize",
+      submitBatch: "Normalize ({count} files)",
+      progressLabel: "Normalizing",
+    },
+    "fade-audio": {
+      "fade-in-s": "Fade in (seconds)",
+      "fade-out-s": "Fade out (seconds)",
+      submit: "Apply Fade",
+      submitBatch: "Apply Fade ({count} files)",
+      progressLabel: "Applying fade",
+    },
+    "reverse-audio": {
+      submit: "Reverse",
+      submitBatch: "Reverse ({count} files)",
+      progressLabel: "Reversing",
+    },
+    "audio-speed": {
+      factor: "Speed factor",
+      submit: "Change Speed",
+      submitBatch: "Change Speed ({count} files)",
+      progressLabel: "Changing speed",
+    },
+    "pitch-shift": {
+      semitones: "Semitones",
+      hint: "0 semitones is not allowed",
+      submit: "Shift Pitch",
+      submitBatch: "Shift Pitch ({count} files)",
+      progressLabel: "Shifting pitch",
+    },
+    "audio-channels": {
+      mode: "Channel mode",
+      "stereo-to-mono": "Stereo to mono",
+      "mono-to-stereo": "Mono to stereo",
+      swap: "Swap left/right",
+      submit: "Convert Channels",
+      submitBatch: "Convert Channels ({count} files)",
+      progressLabel: "Converting channels",
+    },
+    "silence-removal": {
+      "threshold-db": "Silence threshold (dB)",
+      "min-silence-s": "Minimum silence duration (seconds)",
+      submit: "Remove Silence",
+      submitBatch: "Remove Silence ({count} files)",
+      progressLabel: "Removing silence",
+    },
+    "noise-reduction": {
+      strength: "Strength",
+      light: "Light",
+      medium: "Medium",
+      strong: "Strong",
+      submit: "Reduce Noise",
+      submitBatch: "Reduce Noise ({count} files)",
+      progressLabel: "Reducing noise",
+    },
+    "merge-audio": {
+      format: "Output format",
+      mp3: "MP3",
+      wav: "WAV",
+      flac: "FLAC",
+      m4a: "M4A",
+      "order-hint": "Files will be joined in upload order",
+      submit: "Merge Audio",
+      submitBatch: "Merge Audio ({count} files)",
+      progressLabel: "Merging audio",
+    },
+    "split-audio": {
+      mode: "Split mode",
+      time: "By time",
+      parts: "Equal parts",
+      silence: "By silence",
+      "segment-s": "Segment length (seconds)",
+      "num-parts": "Number of parts",
+      "threshold-db": "Silence threshold (dB)",
+      "min-silence-s": "Minimum silence duration (seconds)",
+      submit: "Split Audio",
+      submitBatch: "Split Audio ({count} files)",
+      progressLabel: "Splitting audio",
+    },
+    "ringtone-maker": {
+      "start-s": "Start time (seconds)",
+      "duration-s": "Duration (seconds)",
+      "max-hint": "Maximum 30 seconds",
+      submit: "Create Ringtone",
+      submitBatch: "Create Ringtone ({count} files)",
+      progressLabel: "Creating ringtone",
+    },
+    "waveform-image": {
+      width: "Width (px)",
+      height: "Height (px)",
+      color: "Waveform color",
+      submit: "Generate Waveform",
+      submitBatch: "Generate Waveform ({count} files)",
+      progressLabel: "Generating waveform",
+    },
+    "audio-metadata": {
+      strip: "Strip all metadata",
+      title: "Title",
+      artist: "Artist",
+      album: "Album",
+      submit: "Apply Metadata",
+      submitBatch: "Apply Metadata ({count} files)",
+      progressLabel: "Applying metadata",
+    },
     "merge-pdf": {
       addFiles: "Add PDFs to merge",
       needTwo: "At least two PDFs are required",
diff --git a/packages/shared/src/i18n/it.ts b/packages/shared/src/i18n/it.ts
index 3bdf73a4..9005b7b7 100644
--- a/packages/shared/src/i18n/it.ts
+++ b/packages/shared/src/i18n/it.ts
@@ -400,6 +400,62 @@ export const it: TranslationKeys = {
       name: "Extract Audio",
       description: "Pull the audio track out of a video",
     },
+    "volume-adjust": {
+      name: "Volume Adjust",
+      description: "Increase or decrease audio volume by a fixed gain",
+    },
+    "normalize-audio": {
+      name: "Normalize Audio",
+      description: "Even out loudness to broadcast standard levels",
+    },
+    "fade-audio": {
+      name: "Fade Audio",
+      description: "Add fade-in and fade-out effects to audio",
+    },
+    "reverse-audio": {
+      name: "Reverse Audio",
+      description: "Play audio backwards",
+    },
+    "audio-speed": {
+      name: "Audio Speed",
+      description: "Speed up or slow down audio playback",
+    },
+    "pitch-shift": {
+      name: "Pitch Shift",
+      description: "Raise or lower pitch by semitones without changing speed",
+    },
+    "audio-channels": {
+      name: "Audio Channels",
+      description: "Convert between mono, stereo, or swap left and right channels",
+    },
+    "silence-removal": {
+      name: "Silence Removal",
+      description: "Strip silent sections from audio",
+    },
+    "noise-reduction": {
+      name: "Noise Reduction",
+      description: "Reduce background noise with FFT-based denoising",
+    },
+    "merge-audio": {
+      name: "Merge Audio",
+      description: "Combine multiple audio files into one",
+    },
+    "split-audio": {
+      name: "Split Audio",
+      description: "Split audio by time, equal parts, or silence detection",
+    },
+    "ringtone-maker": {
+      name: "Ringtone Maker",
+      description: "Create a ringtone clip from any audio file",
+    },
+    "waveform-image": {
+      name: "Waveform Image",
+      description: "Generate a waveform visualization as a PNG image",
+    },
+    "audio-metadata": {
+      name: "Audio Metadata",
+      description: "View, edit, or strip audio tags (ID3)",
+    },
     "merge-pdf": {
       name: "Merge PDFs",
       description: "Combine multiple PDFs into one",
@@ -1715,6 +1771,117 @@ export const it: TranslationKeys = {
       submitBatch: "Extract ({count} files)",
       progressLabel: "Extracting",
     },
+    "volume-adjust": {
+      "gain-db": "Gain (dB)",
+      submit: "Adjust Volume",
+      submitBatch: "Adjust Volume ({count} files)",
+      progressLabel: "Adjusting volume",
+    },
+    "normalize-audio": {
+      hint: "EBU R128 loudness normalization",
+      submit: "Normalize",
+      submitBatch: "Normalize ({count} files)",
+      progressLabel: "Normalizing",
+    },
+    "fade-audio": {
+      "fade-in-s": "Fade in (seconds)",
+      "fade-out-s": "Fade out (seconds)",
+      submit: "Apply Fade",
+      submitBatch: "Apply Fade ({count} files)",
+      progressLabel: "Applying fade",
+    },
+    "reverse-audio": {
+      submit: "Reverse",
+      submitBatch: "Reverse ({count} files)",
+      progressLabel: "Reversing",
+    },
+    "audio-speed": {
+      factor: "Speed factor",
+      submit: "Change Speed",
+      submitBatch: "Change Speed ({count} files)",
+      progressLabel: "Changing speed",
+    },
+    "pitch-shift": {
+      semitones: "Semitones",
+      hint: "0 semitones is not allowed",
+      submit: "Shift Pitch",
+      submitBatch: "Shift Pitch ({count} files)",
+      progressLabel: "Shifting pitch",
+    },
+    "audio-channels": {
+      mode: "Channel mode",
+      "stereo-to-mono": "Stereo to mono",
+      "mono-to-stereo": "Mono to stereo",
+      swap: "Swap left/right",
+      submit: "Convert Channels",
+      submitBatch: "Convert Channels ({count} files)",
+      progressLabel: "Converting channels",
+    },
+    "silence-removal": {
+      "threshold-db": "Silence threshold (dB)",
+      "min-silence-s": "Minimum silence duration (seconds)",
+      submit: "Remove Silence",
+      submitBatch: "Remove Silence ({count} files)",
+      progressLabel: "Removing silence",
+    },
+    "noise-reduction": {
+      strength: "Strength",
+      light: "Light",
+      medium: "Medium",
+      strong: "Strong",
+      submit: "Reduce Noise",
+      submitBatch: "Reduce Noise ({count} files)",
+      progressLabel: "Reducing noise",
+    },
+    "merge-audio": {
+      format: "Output format",
+      mp3: "MP3",
+      wav: "WAV",
+      flac: "FLAC",
+      m4a: "M4A",
+      "order-hint": "Files will be joined in upload order",
+      submit: "Merge Audio",
+      submitBatch: "Merge Audio ({count} files)",
+      progressLabel: "Merging audio",
+    },
+    "split-audio": {
+      mode: "Split mode",
+      time: "By time",
+      parts: "Equal parts",
+      silence: "By silence",
+      "segment-s": "Segment length (seconds)",
+      "num-parts": "Number of parts",
+      "threshold-db": "Silence threshold (dB)",
+      "min-silence-s": "Minimum silence duration (seconds)",
+      submit: "Split Audio",
+      submitBatch: "Split Audio ({count} files)",
+      progressLabel: "Splitting audio",
+    },
+    "ringtone-maker": {
+      "start-s": "Start time (seconds)",
+      "duration-s": "Duration (seconds)",
+      "max-hint": "Maximum 30 seconds",
+      submit: "Create Ringtone",
+      submitBatch: "Create Ringtone ({count} files)",
+      progressLabel: "Creating ringtone",
+    },
+    "waveform-image": {
+      width: "Width (px)",
+      height: "Height (px)",
+      color: "Waveform color",
+      submit: "Generate Waveform",
+      submitBatch: "Generate Waveform ({count} files)",
+      progressLabel: "Generating waveform",
+    },
+    "audio-metadata": {
+      strip: "Strip all metadata",
+      title: "Title",
+      artist: "Artist",
+      album: "Album",
+      submit: "Apply Metadata",
+      submitBatch: "Apply Metadata ({count} files)",
+      progressLabel: "Applying metadata",
+    },
     "merge-pdf": {
       addFiles: "Add PDFs to merge",
       needTwo: "At least two PDFs are required",
diff --git a/packages/shared/src/i18n/ja.ts b/packages/shared/src/i18n/ja.ts
index 9eeb0706..3d00b0e0 100644
--- a/packages/shared/src/i18n/ja.ts
+++ b/packages/shared/src/i18n/ja.ts
@@ -364,6 +364,62 @@ export const ja: TranslationKeys = {
       name: "Extract Audio",
       description: "Pull the audio track out of a video",
     },
+    "volume-adjust": {
+      name: "Volume Adjust",
+      description: "Increase or decrease audio volume by a fixed gain",
+    },
+    "normalize-audio": {
+      name: "Normalize Audio",
+      description: "Even out loudness to broadcast standard levels",
+    },
+    "fade-audio": {
+      name: "Fade Audio",
+      description: "Add fade-in and fade-out effects to audio",
+    },
+    "reverse-audio": {
+      name: "Reverse Audio",
+      description: "Play audio backwards",
+    },
+    "audio-speed": {
+      name: "Audio Speed",
+      description: "Speed up or slow down audio playback",
+    },
+    "pitch-shift": {
+      name: "Pitch Shift",
+      description: "Raise or lower pitch by semitones without changing speed",
+    },
+    "audio-channels": {
+      name: "Audio Channels",
+      description: "Convert between mono, stereo, or swap left and right channels",
+    },
+    "silence-removal": {
+      name: "Silence Removal",
+      description: "Strip silent sections from audio",
+    },
+    "noise-reduction": {
+      name: "Noise Reduction",
+      description: "Reduce background noise with FFT-based denoising",
+    },
+    "merge-audio": {
+      name: "Merge Audio",
+      description: "Combine multiple audio files into one",
+    },
+    "split-audio": {
+      name: "Split Audio",
+      description: "Split audio by time, equal parts, or silence detection",
+    },
+    "ringtone-maker": {
+      name: "Ringtone Maker",
+      description: "Create a ringtone clip from any audio file",
+    },
+    "waveform-image": {
+      name: "Waveform Image",
+      description: "Generate a waveform visualization as a PNG image",
+    },
+    "audio-metadata": {
+      name: "Audio Metadata",
+      description: "View, edit, or strip audio tags (ID3)",
+    },
     "merge-pdf": {
       name: "Merge PDFs",
       description: "Combine multiple PDFs into one",
@@ -1674,6 +1730,117 @@ export const ja: TranslationKeys = {
       submitBatch: "Extract ({count} files)",
       progressLabel: "Extracting",
     },
+    "volume-adjust": {
+      "gain-db": "Gain (dB)",
+      submit: "Adjust Volume",
+      submitBatch: "Adjust Volume ({count} files)",
+      progressLabel: "Adjusting volume",
+    },
+    "normalize-audio": {
+      hint: "EBU R128 loudness normalization",
+      submit: "Normalize",
+      submitBatch: "Normalize ({count} files)",
+      progressLabel: "Normalizing",
+    },
+    "fade-audio": {
+      "fade-in-s": "Fade in (seconds)",
+      "fade-out-s": "Fade out (seconds)",
+      submit: "Apply Fade",
+      submitBatch: "Apply Fade ({count} files)",
+      progressLabel: "Applying fade",
+    },
+    "reverse-audio": {
+      submit: "Reverse",
+      submitBatch: "Reverse ({count} files)",
+      progressLabel: "Reversing",
+    },
+    "audio-speed": {
+      factor: "Speed factor",
+      submit: "Change Speed",
+      submitBatch: "Change Speed ({count} files)",
+      progressLabel: "Changing speed",
+    },
+    "pitch-shift": {
+      semitones: "Semitones",
+      hint: "0 semitones is not allowed",
+      submit: "Shift Pitch",
+      submitBatch: "Shift Pitch ({count} files)",
+      progressLabel: "Shifting pitch",
+    },
+    "audio-channels": {
+      mode: "Channel mode",
+      "stereo-to-mono": "Stereo to mono",
+      "mono-to-stereo": "Mono to stereo",
+      swap: "Swap left/right",
+      submit: "Convert Channels",
+      submitBatch: "Convert Channels ({count} files)",
+      progressLabel: "Converting channels",
+    },
+    "silence-removal": {
+      "threshold-db": "Silence threshold (dB)",
+      "min-silence-s": "Minimum silence duration (seconds)",
+      submit: "Remove Silence",
+      submitBatch: "Remove Silence ({count} files)",
+      progressLabel: "Removing silence",
+    },
+    "noise-reduction": {
+      strength: "Strength",
+      light: "Light",
+      medium: "Medium",
+      strong: "Strong",
+      submit: "Reduce Noise",
+      submitBatch: "Reduce Noise ({count} files)",
+      progressLabel: "Reducing noise",
+    },
+    "merge-audio": {
+      format: "Output format",
+      mp3: "MP3",
+      wav: "WAV",
+      flac: "FLAC",
+      m4a: "M4A",
+      "order-hint": "Files will be joined in upload order",
+      submit: "Merge Audio",
+      submitBatch: "Merge Audio ({count} files)",
+      progressLabel: "Merging audio",
+    },
+    "split-audio": {
+      mode: "Split mode",
+      time: "By time",
+      parts: "Equal parts",
+      silence: "By silence",
+      "segment-s": "Segment length (seconds)",
+      "num-parts": "Number of parts",
+      "threshold-db": "Silence threshold (dB)",
+      "min-silence-s": "Minimum silence duration (seconds)",
+      submit: "Split Audio",
+      submitBatch: "Split Audio ({count} files)",
+      progressLabel: "Splitting audio",
+    },
+    "ringtone-maker": {
+      "start-s": "Start time (seconds)",
+      "duration-s": "Duration (seconds)",
+      "max-hint": "Maximum 30 seconds",
+      submit: "Create Ringtone",
+      submitBatch: "Create Ringtone ({count} files)",
+      progressLabel: "Creating ringtone",
+    },
+    "waveform-image": {
+      width: "Width (px)",
+      height: "Height (px)",
+      color: "Waveform color",
+      submit: "Generate Waveform",
+      submitBatch: "Generate Waveform ({count} files)",
+      progressLabel: "Generating waveform",
+    },
+    "audio-metadata": {
+      strip: "Strip all metadata",
+      title: "Title",
+      artist: "Artist",
+      album: "Album",
+      submit: "Apply Metadata",
+      submitBatch: "Apply Metadata ({count} files)",
+      progressLabel: "Applying metadata",
+    },
     "merge-pdf": {
       addFiles: "Add PDFs to merge",
       needTwo: "At least two PDFs are required",
diff --git a/packages/shared/src/i18n/ko.ts b/packages/shared/src/i18n/ko.ts
index 63292c51..9477ad58 100644
--- a/packages/shared/src/i18n/ko.ts
+++ b/packages/shared/src/i18n/ko.ts
@@ -351,6 +351,62 @@ export const ko: TranslationKeys = {
       name: "Extract Audio",
       description: "Pull the audio track out of a video",
     },
+    "volume-adjust": {
+      name: "Volume Adjust",
+      description: "Increase or decrease audio volume by a fixed gain",
+    },
+    "normalize-audio": {
+      name: "Normalize Audio",
+      description: "Even out loudness to broadcast standard levels",
+    },
+    "fade-audio": {
+      name: "Fade Audio",
+      description: "Add fade-in and fade-out effects to audio",
+    },
+    "reverse-audio": {
+      name: "Reverse Audio",
+      description: "Play audio backwards",
+    },
+    "audio-speed": {
+      name: "Audio Speed",
+      description: "Speed up or slow down audio playback",
+    },
+    "pitch-shift": {
+      name: "Pitch Shift",
+      description: "Raise or lower pitch by semitones without changing speed",
+    },
+    "audio-channels": {
+      name: "Audio Channels",
+      description: "Convert between mono, stereo, or swap left and right channels",
+    },
+    "silence-removal": {
+      name: "Silence Removal",
+      description: "Strip silent sections from audio",
+    },
+    "noise-reduction": {
+      name: "Noise Reduction",
+      description: "Reduce background noise with FFT-based denoising",
+    },
+    "merge-audio": {
+      name: "Merge Audio",
+      description: "Combine multiple audio files into one",
+    },
+    "split-audio": {
+      name: "Split Audio",
+      description: "Split audio by time, equal parts, or silence detection",
+    },
+    "ringtone-maker": {
+      name: "Ringtone Maker",
+      description: "Create a ringtone clip from any audio file",
+    },
+    "waveform-image": {
+      name: "Waveform Image",
+      description: "Generate a waveform visualization as a PNG image",
+    },
+    "audio-metadata": {
+      name: "Audio Metadata",
+      description: "View, edit, or strip audio tags (ID3)",
+    },
     "merge-pdf": {
       name: "Merge PDFs",
       description: "Combine multiple PDFs into one",
@@ -1659,6 +1715,117 @@ export const ko: TranslationKeys = {
       submitBatch: "Extract ({count} files)",
       progressLabel: "Extracting",
     },
+    "volume-adjust": {
+      "gain-db": "Gain (dB)",
+      submit: "Adjust Volume",
+      submitBatch: "Adjust Volume ({count} files)",
+      progressLabel: "Adjusting volume",
+    },
+    "normalize-audio": {
+      hint: "EBU R128 loudness normalization",
+      submit: "Normalize",
+      submitBatch: "Normalize ({count} files)",
+      progressLabel: "Normalizing",
+    },
+    "fade-audio": {
+      "fade-in-s": "Fade in (seconds)",
+      "fade-out-s": "Fade out (seconds)",
+      submit: "Apply Fade",
+      submitBatch: "Apply Fade ({count} files)",
+      progressLabel: "Applying fade",
+    },
+    "reverse-audio": {
+      submit: "Reverse",
+      submitBatch: "Reverse ({count} files)",
+      progressLabel: "Reversing",
+    },
+    "audio-speed": {
+      factor: "Speed factor",
+      submit: "Change Speed",
+      submitBatch: "Change Speed ({count} files)",
+      progressLabel: "Changing speed",
+    },
+    "pitch-shift": {
+      semitones: "Semitones",
+      hint: "0 semitones is not allowed",
+      submit: "Shift Pitch",
+      submitBatch: "Shift Pitch ({count} files)",
+      progressLabel: "Shifting pitch",
+    },
+    "audio-channels": {
+      mode: "Channel mode",
+      "stereo-to-mono": "Stereo to mono",
+      "mono-to-stereo": "Mono to stereo",
+      swap: "Swap left/right",
+      submit: "Convert Channels",
+      submitBatch: "Convert Channels ({count} files)",
+      progressLabel: "Converting channels",
+    },
+    "silence-removal": {
+      "threshold-db": "Silence threshold (dB)",
+      "min-silence-s": "Minimum silence duration (seconds)",
+      submit: "Remove Silence",
+      submitBatch: "Remove Silence ({count} files)",
+      progressLabel: "Removing silence",
+    },
+    "noise-reduction": {
+      strength: "Strength",
+      light: "Light",
+      medium: "Medium",
+      strong: "Strong",
+      submit: "Reduce Noise",
+      submitBatch: "Reduce Noise ({count} files)",
+      progressLabel: "Reducing noise",
+    },
+    "merge-audio": {
+      format: "Output format",
+      mp3: "MP3",
+      wav: "WAV",
+      flac: "FLAC",
+      m4a: "M4A",
+      "order-hint": "Files will be joined in upload order",
+      submit: "Merge Audio",
+      submitBatch: "Merge Audio ({count} files)",
+      progressLabel: "Merging audio",
+    },
+    "split-audio": {
+      mode: "Split mode",
+      time: "By time",
+      parts: "Equal parts",
+      silence: "By silence",
+      "segment-s": "Segment length (seconds)",
+      "num-parts": "Number of parts",
+      "threshold-db": "Silence threshold (dB)",
+      "min-silence-s": "Minimum silence duration (seconds)",
+      submit: "Split Audio",
+      submitBatch: "Split Audio ({count} files)",
+      progressLabel: "Splitting audio",
+    },
+    "ringtone-maker": {
+      "start-s": "Start time (seconds)",
+      "duration-s": "Duration (seconds)",
+      "max-hint": "Maximum 30 seconds",
+      submit: "Create Ringtone",
+      submitBatch: "Create Ringtone ({count} files)",
+      progressLabel: "Creating ringtone",
+    },
+    "waveform-image": {
+      width: "Width (px)",
+      height: "Height (px)",
+      color: "Waveform color",
+      submit: "Generate Waveform",
+      submitBatch: "Generate Waveform ({count} files)",
+      progressLabel: "Generating waveform",
+    },
+    "audio-metadata": {
+      strip: "Strip all metadata",
+      title: "Title",
+      artist: "Artist",
+      album: "Album",
+      submit: "Apply Metadata",
+      submitBatch: "Apply Metadata ({count} files)",
+      progressLabel: "Applying metadata",
+    },
     "merge-pdf": {
       addFiles: "Add PDFs to merge",
       needTwo: "At least two PDFs are required",
diff --git a/packages/shared/src/i18n/nl.ts b/packages/shared/src/i18n/nl.ts
index 43676422..929a3552 100644
--- a/packages/shared/src/i18n/nl.ts
+++ b/packages/shared/src/i18n/nl.ts
@@ -401,6 +401,62 @@ export const nl: TranslationKeys = {
       name: "Extract Audio",
       description: "Pull the audio track out of a video",
     },
+    "volume-adjust": {
+      name: "Volume Adjust",
+      description: "Increase or decrease audio volume by a fixed gain",
+    },
+    "normalize-audio": {
+      name: "Normalize Audio",
+      description: "Even out loudness to broadcast standard levels",
+    },
+    "fade-audio": {
+      name: "Fade Audio",
+      description: "Add fade-in and fade-out effects to audio",
+    },
+    "reverse-audio": {
+      name: "Reverse Audio",
+      description: "Play audio backwards",
+    },
+    "audio-speed": {
+      name: "Audio Speed",
+      description: "Speed up or slow down audio playback",
+    },
+    "pitch-shift": {
+      name: "Pitch Shift",
+      description: "Raise or lower pitch by semitones without changing speed",
+    },
+    "audio-channels": {
+      name: "Audio Channels",
+      description: "Convert between mono, stereo, or swap left and right channels",
+    },
+    "silence-removal": {
+      name: "Silence Removal",
+      description: "Strip silent sections from audio",
+    },
+    "noise-reduction": {
+      name: "Noise Reduction",
+      description: "Reduce background noise with FFT-based denoising",
+    },
+    "merge-audio": {
+      name: "Merge Audio",
+      description: "Combine multiple audio files into one",
+    },
+    "split-audio": {
+      name: "Split Audio",
+      description: "Split audio by time, equal parts, or silence detection",
+    },
+    "ringtone-maker": {
+      name: "Ringtone Maker",
+      description: "Create a ringtone clip from any audio file",
+    },
+    "waveform-image": {
+      name: "Waveform Image",
+      description: "Generate a waveform visualization as a PNG image",
+    },
+    "audio-metadata": {
+      name: "Audio Metadata",
+      description: "View, edit, or strip audio tags (ID3)",
+    },
     "merge-pdf": {
       name: "Merge PDFs",
       description: "Combine multiple PDFs into one",
@@ -1718,6 +1774,117 @@ export const nl: TranslationKeys = {
       submitBatch: "Extract ({count} files)",
       progressLabel: "Extracting",
     },
+    "volume-adjust": {
+      "gain-db": "Gain (dB)",
+      submit: "Adjust Volume",
+      submitBatch: "Adjust Volume ({count} files)",
+      progressLabel: "Adjusting volume",
+    },
+    "normalize-audio": {
+      hint: "EBU R128 loudness normalization",
+      submit: "Normalize",
+      submitBatch: "Normalize ({count} files)",
+      progressLabel: "Normalizing",
+    },
+    "fade-audio": {
+      "fade-in-s": "Fade in (seconds)",
+      "fade-out-s": "Fade out (seconds)",
+      submit: "Apply Fade",
+      submitBatch: "Apply Fade ({count} files)",
+      progressLabel: "Applying fade",
+    },
+    "reverse-audio": {
+      submit: "Reverse",
+      submitBatch: "Reverse ({count} files)",
+      progressLabel: "Reversing",
+    },
+    "audio-speed": {
+      factor: "Speed factor",
+      submit: "Change Speed",
+      submitBatch: "Change Speed ({count} files)",
+      progressLabel: "Changing speed",
+    },
+    "pitch-shift": {
+      semitones: "Semitones",
+      hint: "0 semitones is not allowed",
+      submit: "Shift Pitch",
+      submitBatch: "Shift Pitch ({count} files)",
+      progressLabel: "Shifting pitch",
+    },
+    "audio-channels": {
+      mode: "Channel mode",
+      "stereo-to-mono": "Stereo to mono",
+      "mono-to-stereo": "Mono to stereo",
+      swap: "Swap left/right",
+      submit: "Convert Channels",
+      submitBatch: "Convert Channels ({count} files)",
+      progressLabel: "Converting channels",
+    },
+    "silence-removal": {
+      "threshold-db": "Silence threshold (dB)",
+      "min-silence-s": "Minimum silence duration (seconds)",
+      submit: "Remove Silence",
+      submitBatch: "Remove Silence ({count} files)",
+      progressLabel: "Removing silence",
+    },
+    "noise-reduction": {
+      strength: "Strength",
+      light: "Light",
+      medium: "Medium",
+      strong: "Strong",
+      submit: "Reduce Noise",
+      submitBatch: "Reduce Noise ({count} files)",
+      progressLabel: "Reducing noise",
+    },
+    "merge-audio": {
+      format: "Output format",
+      mp3: "MP3",
+      wav: "WAV",
+      flac: "FLAC",
+      m4a: "M4A",
+      "order-hint": "Files will be joined in upload order",
+      submit: "Merge Audio",
+      submitBatch: "Merge Audio ({count} files)",
+      progressLabel: "Merging audio",
+    },
+    "split-audio": {
+      mode: "Split mode",
+      time: "By time",
+      parts: "Equal parts",
+      silence: "By silence",
+      "segment-s": "Segment length (seconds)",
+      "num-parts": "Number of parts",
+      "threshold-db": "Silence threshold (dB)",
+      "min-silence-s": "Minimum silence duration (seconds)",
+      submit: "Split Audio",
+      submitBatch: "Split Audio ({count} files)",
+      progressLabel: "Splitting audio",
+    },
+    "ringtone-maker": {
+      "start-s": "Start time (seconds)",
+      "duration-s": "Duration (seconds)",
+      "max-hint": "Maximum 30 seconds",
+      submit: "Create Ringtone",
+      submitBatch: "Create Ringtone ({count} files)",
+      progressLabel: "Creating ringtone",
+    },
+    "waveform-image": {
+      width: "Width (px)",
+      height: "Height (px)",
+      color: "Waveform color",
+      submit: "Generate Waveform",
+      submitBatch: "Generate Waveform ({count} files)",
+      progressLabel: "Generating waveform",
+    },
+    "audio-metadata": {
+      strip: "Strip all metadata",
+      title: "Title",
+      artist: "Artist",
+      album: "Album",
+      submit: "Apply Metadata",
+      submitBatch: "Apply Metadata ({count} files)",
+      progressLabel: "Applying metadata",
+    },
     "merge-pdf": {
       addFiles: "Add PDFs to merge",
       needTwo: "At least two PDFs are required",
diff --git a/packages/shared/src/i18n/pl.ts b/packages/shared/src/i18n/pl.ts
index 817c03ac..53508222 100644
--- a/packages/shared/src/i18n/pl.ts
+++ b/packages/shared/src/i18n/pl.ts
@@ -402,6 +402,62 @@ export const pl: TranslationKeys = {
       name: "Extract Audio",
       description: "Pull the audio track out of a video",
     },
+    "volume-adjust": {
+      name: "Volume Adjust",
+      description: "Increase or decrease audio volume by a fixed gain",
+    },
+    "normalize-audio": {
+      name: "Normalize Audio",
+      description: "Even out loudness to broadcast standard levels",
+    },
+    "fade-audio": {
+      name: "Fade Audio",
+      description: "Add fade-in and fade-out effects to audio",
+    },
+    "reverse-audio": {
+      name: "Reverse Audio",
+      description: "Play audio backwards",
+    },
+    "audio-speed": {
+      name: "Audio Speed",
+      description: "Speed up or slow down audio playback",
+    },
+    "pitch-shift": {
+      name: "Pitch Shift",
+      description: "Raise or lower pitch by semitones without changing speed",
+    },
+    "audio-channels": {
+      name: "Audio Channels",
+      description: "Convert between mono, stereo, or swap left and right channels",
+    },
+    "silence-removal": {
+      name: "Silence Removal",
+      description: "Strip silent sections from audio",
+    },
+    "noise-reduction": {
+      name: "Noise Reduction",
+      description: "Reduce background noise with FFT-based denoising",
+    },
+    "merge-audio": {
+      name: "Merge Audio",
+      description: "Combine multiple audio files into one",
+    },
+    "split-audio": {
+      name: "Split Audio",
+      description: "Split audio by time, equal parts, or silence detection",
+    },
+    "ringtone-maker": {
+      name: "Ringtone Maker",
+      description: "Create a ringtone clip from any audio file",
+    },
+    "waveform-image": {
+      name: "Waveform Image",
+      description: "Generate a waveform visualization as a PNG image",
+    },
+    "audio-metadata": {
+      name: "Audio Metadata",
+      description: "View, edit, or strip audio tags (ID3)",
+    },
     "merge-pdf": {
       name: "Merge PDFs",
       description: "Combine multiple PDFs into one",
@@ -1719,6 +1775,117 @@ export const pl: TranslationKeys = {
       submitBatch: "Extract ({count} files)",
       progressLabel: "Extracting",
     },
+    "volume-adjust": {
+      "gain-db": "Gain (dB)",
+      submit: "Adjust Volume",
+      submitBatch: "Adjust Volume ({count} files)",
+      progressLabel: "Adjusting volume",
+    },
+    "normalize-audio": {
+      hint: "EBU R128 loudness normalization",
+      submit: "Normalize",
+      submitBatch: "Normalize ({count} files)",
+      progressLabel: "Normalizing",
+    },
+    "fade-audio": {
+      "fade-in-s": "Fade in (seconds)",
+      "fade-out-s": "Fade out (seconds)",
+      submit: "Apply Fade",
+      submitBatch: "Apply Fade ({count} files)",
+      progressLabel: "Applying fade",
+    },
+    "reverse-audio": {
+      submit: "Reverse",
+      submitBatch: "Reverse ({count} files)",
+      progressLabel: "Reversing",
+    },
+    "audio-speed": {
+      factor: "Speed factor",
+      submit: "Change Speed",
+      submitBatch: "Change Speed ({count} files)",
+      progressLabel: "Changing speed",
+    },
+    "pitch-shift": {
+      semitones: "Semitones",
+      hint: "0 semitones is not allowed",
+      submit: "Shift Pitch",
+      submitBatch: "Shift Pitch ({count} files)",
+      progressLabel: "Shifting pitch",
+    },
+    "audio-channels": {
+      mode: "Channel mode",
+      "stereo-to-mono": "Stereo to mono",
+      "mono-to-stereo": "Mono to stereo",
+      swap: "Swap left/right",
+      submit: "Convert Channels",
+      submitBatch: "Convert Channels ({count} files)",
+      progressLabel: "Converting channels",
+    },
+    "silence-removal": {
+      "threshold-db": "Silence threshold (dB)",
+      "min-silence-s": "Minimum silence duration (seconds)",
+      submit: "Remove Silence",
+      submitBatch: "Remove Silence ({count} files)",
+      progressLabel: "Removing silence",
+    },
+    "noise-reduction": {
+      strength: "Strength",
+      light: "Light",
+      medium: "Medium",
+      strong: "Strong",
+      submit: "Reduce Noise",
+      submitBatch: "Reduce Noise ({count} files)",
+      progressLabel: "Reducing noise",
+    },
+    "merge-audio": {
+      format: "Output format",
+      mp3: "MP3",
+      wav: "WAV",
+      flac: "FLAC",
+      m4a: "M4A",
+      "order-hint": "Files will be joined in upload order",
+      submit: "Merge Audio",
+      submitBatch: "Merge Audio ({count} files)",
+      progressLabel: "Merging audio",
+    },
+    "split-audio": {
+      mode: "Split mode",
+      time: "By time",
+      parts: "Equal parts",
+      silence: "By silence",
+      "segment-s": "Segment length (seconds)",
+      "num-parts": "Number of parts",
+      "threshold-db": "Silence threshold (dB)",
+      "min-silence-s": "Minimum silence duration (seconds)",
+      submit: "Split Audio",
+      submitBatch: "Split Audio ({count} files)",
+      progressLabel: "Splitting audio",
+    },
+    "ringtone-maker": {
+      "start-s": "Start time (seconds)",
+      "duration-s": "Duration (seconds)",
+      "max-hint": "Maximum 30 seconds",
+      submit: "Create Ringtone",
+      submitBatch: "Create Ringtone ({count} files)",
+      progressLabel: "Creating ringtone",
+    },
+    "waveform-image": {
+      width: "Width (px)",
+      height: "Height (px)",
+      color: "Waveform color",
+      submit: "Generate Waveform",
+      submitBatch: "Generate Waveform ({count} files)",
+      progressLabel: "Generating waveform",
+    },
+    "audio-metadata": {
+      strip: "Strip all metadata",
+      title: "Title",
+      artist: "Artist",
+      album: "Album",
+      submit: "Apply Metadata",
+      submitBatch: "Apply Metadata ({count} files)",
+      progressLabel: "Applying metadata",
+    },
     "merge-pdf": {
       addFiles: "Add PDFs to merge",
       needTwo: "At least two PDFs are required",
diff --git a/packages/shared/src/i18n/pt-BR.ts b/packages/shared/src/i18n/pt-BR.ts
index 69e71041..0a708e99 100644
--- a/packages/shared/src/i18n/pt-BR.ts
+++ b/packages/shared/src/i18n/pt-BR.ts
@@ -399,6 +399,62 @@ export const ptBR: TranslationKeys = {
       name: "Extract Audio",
       description: "Pull the audio track out of a video",
     },
+    "volume-adjust": {
+      name: "Volume Adjust",
+      description: "Increase or decrease audio volume by a fixed gain",
+    },
+    "normalize-audio": {
+      name: "Normalize Audio",
+      description: "Even out loudness to broadcast standard levels",
+    },
+    "fade-audio": {
+      name: "Fade Audio",
+      description: "Add fade-in and fade-out effects to audio",
+    },
+    "reverse-audio": {
+      name: "Reverse Audio",
+      description: "Play audio backwards",
+    },
+    "audio-speed": {
+      name: "Audio Speed",
+      description: "Speed up or slow down audio playback",
+    },
+    "pitch-shift": {
+      name: "Pitch Shift",
+      description: "Raise or lower pitch by semitones without changing speed",
+    },
+    "audio-channels": {
+      name: "Audio Channels",
+      description: "Convert between mono, stereo, or swap left and right channels",
+    },
+    "silence-removal": {
+      name: "Silence Removal",
+      description: "Strip silent sections from audio",
+    },
+    "noise-reduction": {
+      name: "Noise Reduction",
+      description: "Reduce background noise with FFT-based denoising",
+    },
+    "merge-audio": {
+      name: "Merge Audio",
+      description: "Combine multiple audio files into one",
+    },
+    "split-audio": {
+      name: "Split Audio",
+      description: "Split audio by time, equal parts, or silence detection",
+    },
+    "ringtone-maker": {
+      name: "Ringtone Maker",
+      description: "Create a ringtone clip from any audio file",
+    },
+    "waveform-image": {
+      name: "Waveform Image",
+      description: "Generate a waveform visualization as a PNG image",
+    },
+    "audio-metadata": {
+      name: "Audio Metadata",
+      description: "View, edit, or strip audio tags (ID3)",
+    },
     "merge-pdf": {
       name: "Merge PDFs",
       description: "Combine multiple PDFs into one",
@@ -1715,6 +1771,117 @@ export const ptBR: TranslationKeys = {
       submitBatch: "Extract ({count} files)",
       progressLabel: "Extracting",
     },
+    "volume-adjust": {
+      "gain-db": "Gain (dB)",
+      submit: "Adjust Volume",
+      submitBatch: "Adjust Volume ({count} files)",
+      progressLabel: "Adjusting volume",
+    },
+    "normalize-audio": {
+      hint: "EBU R128 loudness normalization",
+      submit: "Normalize",
+      submitBatch: "Normalize ({count} files)",
+      progressLabel: "Normalizing",
+    },
+    "fade-audio": {
+      "fade-in-s": "Fade in (seconds)",
+      "fade-out-s": "Fade out (seconds)",
+      submit: "Apply Fade",
+      submitBatch: "Apply Fade ({count} files)",
+      progressLabel: "Applying fade",
+    },
+    "reverse-audio": {
+      submit: "Reverse",
+      submitBatch: "Reverse ({count} files)",
+      progressLabel: "Reversing",
+    },
+    "audio-speed": {
+      factor: "Speed factor",
+      submit: "Change Speed",
+      submitBatch: "Change Speed ({count} files)",
+      progressLabel: "Changing speed",
+    },
+    "pitch-shift": {
+      semitones: "Semitones",
+      hint: "0 semitones is not allowed",
+      submit: "Shift Pitch",
+      submitBatch: "Shift Pitch ({count} files)",
+      progressLabel: "Shifting pitch",
+    },
+    "audio-channels": {
+      mode: "Channel mode",
+      "stereo-to-mono": "Stereo to mono",
+      "mono-to-stereo": "Mono to stereo",
+      swap: "Swap left/right",
+      submit: "Convert Channels",
+      submitBatch: "Convert Channels ({count} files)",
+      progressLabel: "Converting channels",
+    },
+    "silence-removal": {
+      "threshold-db": "Silence threshold (dB)",
+      "min-silence-s": "Minimum silence duration (seconds)",
+      submit: "Remove Silence",
+      submitBatch: "Remove Silence ({count} files)",
+      progressLabel: "Removing silence",
+    },
+    "noise-reduction": {
+      strength: "Strength",
+      light: "Light",
+      medium: "Medium",
+      strong: "Strong",
+      submit: "Reduce Noise",
+      submitBatch: "Reduce Noise ({count} files)",
+      progressLabel: "Reducing noise",
+    },
+    "merge-audio": {
+      format: "Output format",
+      mp3: "MP3",
+      wav: "WAV",
+      flac: "FLAC",
+      m4a: "M4A",
+      "order-hint": "Files will be joined in upload order",
+      submit: "Merge Audio",
+      submitBatch: "Merge Audio ({count} files)",
+      progressLabel: "Merging audio",
+    },
+    "split-audio": {
+      mode: "Split mode",
+      time: "By time",
+      parts: "Equal parts",
+      silence: "By silence",
+      "segment-s": "Segment length (seconds)",
+      "num-parts": "Number of parts",
+      "threshold-db": "Silence threshold (dB)",
+      "min-silence-s": "Minimum silence duration (seconds)",
+      submit: "Split Audio",
+      submitBatch: "Split Audio ({count} files)",
+      progressLabel: "Splitting audio",
+    },
+    "ringtone-maker": {
+      "start-s": "Start time (seconds)",
+      "duration-s": "Duration (seconds)",
+      "max-hint": "Maximum 30 seconds",
+      submit: "Create Ringtone",
+      submitBatch: "Create Ringtone ({count} files)",
+      progressLabel: "Creating ringtone",
+    },
+    "waveform-image": {
+      width: "Width (px)",
+      height: "Height (px)",
+      color: "Waveform color",
+      submit: "Generate Waveform",
+      submitBatch: "Generate Waveform ({count} files)",
+      progressLabel: "Generating waveform",
+    },
+    "audio-metadata": {
+      strip: "Strip all metadata",
+      title: "Title",
+      artist: "Artist",
+      album: "Album",
+      submit: "Apply Metadata",
+      submitBatch: "Apply Metadata ({count} files)",
+      progressLabel: "Applying metadata",
+    },
     "merge-pdf": {
       addFiles: "Add PDFs to merge",
       needTwo: "At least two PDFs are required",
diff --git a/packages/shared/src/i18n/ru.ts b/packages/shared/src/i18n/ru.ts
index 4da27a4d..190261ba 100644
--- a/packages/shared/src/i18n/ru.ts
+++ b/packages/shared/src/i18n/ru.ts
@@ -401,6 +401,62 @@ export const ru: TranslationKeys = {
       name: "Extract Audio",
       description: "Pull the audio track out of a video",
     },
+    "volume-adjust": {
+      name: "Volume Adjust",
+      description: "Increase or decrease audio volume by a fixed gain",
+    },
+    "normalize-audio": {
+      name: "Normalize Audio",
+      description: "Even out loudness to broadcast standard levels",
+    },
+    "fade-audio": {
+      name: "Fade Audio",
+      description: "Add fade-in and fade-out effects to audio",
+    },
+    "reverse-audio": {
+      name: "Reverse Audio",
+      description: "Play audio backwards",
+    },
+    "audio-speed": {
+      name: "Audio Speed",
+      description: "Speed up or slow down audio playback",
+    },
+    "pitch-shift": {
+      name: "Pitch Shift",
+      description: "Raise or lower pitch by semitones without changing speed",
+    },
+    "audio-channels": {
+      name: "Audio Channels",
+      description: "Convert between mono, stereo, or swap left and right channels",
+    },
+    "silence-removal": {
+      name: "Silence Removal",
+      description: "Strip silent sections from audio",
+    },
+    "noise-reduction": {
+      name: "Noise Reduction",
+      description: "Reduce background noise with FFT-based denoising",
+    },
+    "merge-audio": {
+      name: "Merge Audio",
+      description: "Combine multiple audio files into one",
+    },
+    "split-audio": {
+      name: "Split Audio",
+      description: "Split audio by time, equal parts, or silence detection",
+    },
+    "ringtone-maker": {
+      name: "Ringtone Maker",
+      description: "Create a ringtone clip from any audio file",
+    },
+    "waveform-image": {
+      name: "Waveform Image",
+      description: "Generate a waveform visualization as a PNG image",
+    },
+    "audio-metadata": {
+      name: "Audio Metadata",
+      description: "View, edit, or strip audio tags (ID3)",
+    },
     "merge-pdf": {
       name: "Merge PDFs",
       description: "Combine multiple PDFs into one",
@@ -1717,6 +1773,117 @@ export const ru: TranslationKeys = {
       submitBatch: "Extract ({count} files)",
       progressLabel: "Extracting",
     },
+    "volume-adjust": {
+      "gain-db": "Gain (dB)",
+      submit: "Adjust Volume",
+      submitBatch: "Adjust Volume ({count} files)",
+      progressLabel: "Adjusting volume",
+    },
+    "normalize-audio": {
+      hint: "EBU R128 loudness normalization",
+      submit: "Normalize",
+      submitBatch: "Normalize ({count} files)",
+      progressLabel: "Normalizing",
+    },
+    "fade-audio": {
+      "fade-in-s": "Fade in (seconds)",
+      "fade-out-s": "Fade out (seconds)",
+      submit: "Apply Fade",
+      submitBatch: "Apply Fade ({count} files)",
+      progressLabel: "Applying fade",
+    },
+    "reverse-audio": {
+      submit: "Reverse",
+      submitBatch: "Reverse ({count} files)",
+      progressLabel: "Reversing",
+    },
+    "audio-speed": {
+      factor: "Speed factor",
+      submit: "Change Speed",
+      submitBatch: "Change Speed ({count} files)",
+      progressLabel: "Changing speed",
+    },
+    "pitch-shift": {
+      semitones: "Semitones",
+      hint: "0 semitones is not allowed",
+      submit: "Shift Pitch",
+      submitBatch: "Shift Pitch ({count} files)",
+      progressLabel: "Shifting pitch",
+    },
+    "audio-channels": {
+      mode: "Channel mode",
+      "stereo-to-mono": "Stereo to mono",
+      "mono-to-stereo": "Mono to stereo",
+      swap: "Swap left/right",
+      submit: "Convert Channels",
+      submitBatch: "Convert Channels ({count} files)",
+      progressLabel: "Converting channels",
+    },
+    "silence-removal": {
+      "threshold-db": "Silence threshold (dB)",
+      "min-silence-s": "Minimum silence duration (seconds)",
+      submit: "Remove Silence",
+      submitBatch: "Remove Silence ({count} files)",
+      progressLabel: "Removing silence",
+    },
+    "noise-reduction": {
+      strength: "Strength",
+      light: "Light",
+      medium: "Medium",
+      strong: "Strong",
+      submit: "Reduce Noise",
+      submitBatch: "Reduce Noise ({count} files)",
+      progressLabel: "Reducing noise",
+    },
+    "merge-audio": {
+      format: "Output format",
+      mp3: "MP3",
+      wav: "WAV",
+      flac: "FLAC",
+      m4a: "M4A",
+      "order-hint": "Files will be joined in upload order",
+      submit: "Merge Audio",
+      submitBatch: "Merge Audio ({count} files)",
+      progressLabel: "Merging audio",
+    },
+    "split-audio": {
+      mode: "Split mode",
+      time: "By time",
+      parts: "Equal parts",
+      silence: "By silence",
+      "segment-s": "Segment length (seconds)",
+      "num-parts": "Number of parts",
+      "threshold-db": "Silence threshold (dB)",
+      "min-silence-s": "Minimum silence duration (seconds)",
+      submit: "Split Audio",
+      submitBatch: "Split Audio ({count} files)",
+      progressLabel: "Splitting audio",
+    },
+    "ringtone-maker": {
+      "start-s": "Start time (seconds)",
+      "duration-s": "Duration (seconds)",
+      "max-hint": "Maximum 30 seconds",
+      submit: "Create Ringtone",
+      submitBatch: "Create Ringtone ({count} files)",
+      progressLabel: "Creating ringtone",
+    },
+    "waveform-image": {
+      width: "Width (px)",
+      height: "Height (px)",
+      color: "Waveform color",
+      submit: "Generate Waveform",
+      submitBatch: "Generate Waveform ({count} files)",
+      progressLabel: "Generating waveform",
+    },
+    "audio-metadata": {
+      strip: "Strip all metadata",
+      title: "Title",
+      artist: "Artist",
+      album: "Album",
+      submit: "Apply Metadata",
+      submitBatch: "Apply Metadata ({count} files)",
+      progressLabel: "Applying metadata",
+    },
     "merge-pdf": {
       addFiles: "Add PDFs to merge",
       needTwo: "At least two PDFs are required",
diff --git a/packages/shared/src/i18n/sv.ts b/packages/shared/src/i18n/sv.ts
index a6e5d462..cd1c14ec 100644
--- a/packages/shared/src/i18n/sv.ts
+++ b/packages/shared/src/i18n/sv.ts
@@ -399,6 +399,62 @@ export const sv: TranslationKeys = {
       name: "Extract Audio",
       description: "Pull the audio track out of a video",
     },
+    "volume-adjust": {
+      name: "Volume Adjust",
+      description: "Increase or decrease audio volume by a fixed gain",
+    },
+    "normalize-audio": {
+      name: "Normalize Audio",
+      description: "Even out loudness to broadcast standard levels",
+    },
+    "fade-audio": {
+      name: "Fade Audio",
+      description: "Add fade-in and fade-out effects to audio",
+    },
+    "reverse-audio": {
+      name: "Reverse Audio",
+      description: "Play audio backwards",
+    },
+    "audio-speed": {
+      name: "Audio Speed",
+      description: "Speed up or slow down audio playback",
+    },
+    "pitch-shift": {
+      name: "Pitch Shift",
+      description: "Raise or lower pitch by semitones without changing speed",
+    },
+    "audio-channels": {
+      name: "Audio Channels",
+      description: "Convert between mono, stereo, or swap left and right channels",
+    },
+    "silence-removal": {
+      name: "Silence Removal",
+      description: "Strip silent sections from audio",
+    },
+    "noise-reduction": {
+      name: "Noise Reduction",
+      description: "Reduce background noise with FFT-based denoising",
+    },
+    "merge-audio": {
+      name: "Merge Audio",
+      description: "Combine multiple audio files into one",
+    },
+    "split-audio": {
+      name: "Split Audio",
+      description: "Split audio by time, equal parts, or silence detection",
+    },
+    "ringtone-maker": {
+      name: "Ringtone Maker",
+      description: "Create a ringtone clip from any audio file",
+    },
+    "waveform-image": {
+      name: "Waveform Image",
+      description: "Generate a waveform visualization as a PNG image",
+    },
+    "audio-metadata": {
+      name: "Audio Metadata",
+      description: "View, edit, or strip audio tags (ID3)",
+    },
     "merge-pdf": {
       name: "Merge PDFs",
       description: "Combine multiple PDFs into one",
@@ -1714,6 +1770,117 @@ export const sv: TranslationKeys = {
       submitBatch: "Extract ({count} files)",
       progressLabel: "Extracting",
     },
+    "volume-adjust": {
+      "gain-db": "Gain (dB)",
+      submit: "Adjust Volume",
+      submitBatch: "Adjust Volume ({count} files)",
+      progressLabel: "Adjusting volume",
+    },
+    "normalize-audio": {
+      hint: "EBU R128 loudness normalization",
+      submit: "Normalize",
+      submitBatch: "Normalize ({count} files)",
+      progressLabel: "Normalizing",
+    },
+    "fade-audio": {
+      "fade-in-s": "Fade in (seconds)",
+      "fade-out-s": "Fade out (seconds)",
+      submit: "Apply Fade",
+      submitBatch: "Apply Fade ({count} files)",
+      progressLabel: "Applying fade",
+    },
+    "reverse-audio": {
+      submit: "Reverse",
+      submitBatch: "Reverse ({count} files)",
+      progressLabel: "Reversing",
+    },
+    "audio-speed": {
+      factor: "Speed factor",
+      submit: "Change Speed",
+      submitBatch: "Change Speed ({count} files)",
+      progressLabel: "Changing speed",
+    },
+    "pitch-shift": {
+      semitones: "Semitones",
+      hint: "0 semitones is not allowed",
+      submit: "Shift Pitch",
+      submitBatch: "Shift Pitch ({count} files)",
+      progressLabel: "Shifting pitch",
+    },
+    "audio-channels": {
+      mode: "Channel mode",
+      "stereo-to-mono": "Stereo to mono",
+      "mono-to-stereo": "Mono to stereo",
+      swap: "Swap left/right",
+      submit: "Convert Channels",
+      submitBatch: "Convert Channels ({count} files)",
+      progressLabel: "Converting channels",
+    },
+    "silence-removal": {
+      "threshold-db": "Silence threshold (dB)",
+      "min-silence-s": "Minimum silence duration (seconds)",
+      submit: "Remove Silence",
+      submitBatch: "Remove Silence ({count} files)",
+      progressLabel: "Removing silence",
+    },
+    "noise-reduction": {
+      strength: "Strength",
+      light: "Light",
+      medium: "Medium",
+      strong: "Strong",
+      submit: "Reduce Noise",
+      submitBatch: "Reduce Noise ({count} files)",
+      progressLabel: "Reducing noise",
+    },
+    "merge-audio": {
+      format: "Output format",
+      mp3: "MP3",
+      wav: "WAV",
+      flac: "FLAC",
+      m4a: "M4A",
+      "order-hint": "Files will be joined in upload order",
+      submit: "Merge Audio",
+      submitBatch: "Merge Audio ({count} files)",
+      progressLabel: "Merging audio",
+    },
+    "split-audio": {
+      mode: "Split mode",
+      time: "By time",
+      parts: "Equal parts",
+      silence: "By silence",
+      "segment-s": "Segment length (seconds)",
+      "num-parts": "Number of parts",
+      "threshold-db": "Silence threshold (dB)",
+      "min-silence-s": "Minimum silence duration (seconds)",
+      submit: "Split Audio",
+      submitBatch: "Split Audio ({count} files)",
+      progressLabel: "Splitting audio",
+    },
+    "ringtone-maker": {
+      "start-s": "Start time (seconds)",
+      "duration-s": "Duration (seconds)",
+      "max-hint": "Maximum 30 seconds",
+      submit: "Create Ringtone",
+      submitBatch: "Create Ringtone ({count} files)",
+      progressLabel: "Creating ringtone",
+    },
+    "waveform-image": {
+      width: "Width (px)",
+      height: "Height (px)",
+      color: "Waveform color",
+      submit: "Generate Waveform",
+      submitBatch: "Generate Waveform ({count} files)",
+      progressLabel: "Generating waveform",
+    },
+    "audio-metadata": {
+      strip: "Strip all metadata",
+      title: "Title",
+      artist: "Artist",
+      album: "Album",
+      submit: "Apply Metadata",
+      submitBatch: "Apply Metadata ({count} files)",
+      progressLabel: "Applying metadata",
+    },
     "merge-pdf": {
       addFiles: "Add PDFs to merge",
       needTwo: "At least two PDFs are required",
diff --git a/packages/shared/src/i18n/th.ts b/packages/shared/src/i18n/th.ts
index 1568e3fc..232ebb06 100644
--- a/packages/shared/src/i18n/th.ts
+++ b/packages/shared/src/i18n/th.ts
@@ -394,6 +394,62 @@ export const th: TranslationKeys = {
       name: "Extract Audio",
       description: "Pull the audio track out of a video",
     },
+    "volume-adjust": {
+      name: "Volume Adjust",
+      description: "Increase or decrease audio volume by a fixed gain",
+    },
+    "normalize-audio": {
+      name: "Normalize Audio",
+      description: "Even out loudness to broadcast standard levels",
+    },
+    "fade-audio": {
+      name: "Fade Audio",
+      description: "Add fade-in and fade-out effects to audio",
+    },
+    "reverse-audio": {
+      name: "Reverse Audio",
+      description: "Play audio backwards",
+    },
+    "audio-speed": {
+      name: "Audio Speed",
+      description: "Speed up or slow down audio playback",
+    },
+    "pitch-shift": {
+      name: "Pitch Shift",
+      description: "Raise or lower pitch by semitones without changing speed",
+    },
+    "audio-channels": {
+      name: "Audio Channels",
+      description: "Convert between mono, stereo, or swap left and right channels",
+    },
+    "silence-removal": {
+      name: "Silence Removal",
+      description: "Strip silent sections from audio",
+    },
+    "noise-reduction": {
+      name: "Noise Reduction",
+      description: "Reduce background noise with FFT-based denoising",
+    },
+    "merge-audio": {
+      name: "Merge Audio",
+      description: "Combine multiple audio files into one",
+    },
+    "split-audio": {
+      name: "Split Audio",
+      description: "Split audio by time, equal parts, or silence detection",
+    },
+    "ringtone-maker": {
+      name: "Ringtone Maker",
+      description: "Create a ringtone clip from any audio file",
+    },
+    "waveform-image": {
+      name: "Waveform Image",
+      description: "Generate a waveform visualization as a PNG image",
+    },
+    "audio-metadata": {
+      name: "Audio Metadata",
+      description: "View, edit, or strip audio tags (ID3)",
+    },
     "merge-pdf": {
       name: "Merge PDFs",
       description: "Combine multiple PDFs into one",
@@ -1697,6 +1753,117 @@ export const th: TranslationKeys = {
       submitBatch: "Extract ({count} files)",
       progressLabel: "Extracting",
     },
+    "volume-adjust": {
+      "gain-db": "Gain (dB)",
+      submit: "Adjust Volume",
+      submitBatch: "Adjust Volume ({count} files)",
+      progressLabel: "Adjusting volume",
+    },
+    "normalize-audio": {
+      hint: "EBU R128 loudness normalization",
+      submit: "Normalize",
+      submitBatch: "Normalize ({count} files)",
+      progressLabel: "Normalizing",
+    },
+    "fade-audio": {
+      "fade-in-s": "Fade in (seconds)",
+      "fade-out-s": "Fade out (seconds)",
+      submit: "Apply Fade",
+      submitBatch: "Apply Fade ({count} files)",
+      progressLabel: "Applying fade",
+    },
+    "reverse-audio": {
+      submit: "Reverse",
+      submitBatch: "Reverse ({count} files)",
+      progressLabel: "Reversing",
+    },
+    "audio-speed": {
+      factor: "Speed factor",
+      submit: "Change Speed",
+      submitBatch: "Change Speed ({count} files)",
+      progressLabel: "Changing speed",
+    },
+    "pitch-shift": {
+      semitones: "Semitones",
+      hint: "0 semitones is not allowed",
+      submit: "Shift Pitch",
+      submitBatch: "Shift Pitch ({count} files)",
+      progressLabel: "Shifting pitch",
+    },
+    "audio-channels": {
+      mode: "Channel mode",
+      "stereo-to-mono": "Stereo to mono",
+      "mono-to-stereo": "Mono to stereo",
+      swap: "Swap left/right",
+      submit: "Convert Channels",
+      submitBatch: "Convert Channels ({count} files)",
+      progressLabel: "Converting channels",
+    },
+    "silence-removal": {
+      "threshold-db": "Silence threshold (dB)",
+      "min-silence-s": "Minimum silence duration (seconds)",
+      submit: "Remove Silence",
+      submitBatch: "Remove Silence ({count} files)",
+      progressLabel: "Removing silence",
+    },
+    "noise-reduction": {
+      strength: "Strength",
+      light: "Light",
+      medium: "Medium",
+      strong: "Strong",
+      submit: "Reduce Noise",
+      submitBatch: "Reduce Noise ({count} files)",
+      progressLabel: "Reducing noise",
+    },
+    "merge-audio": {
+      format: "Output format",
+      mp3: "MP3",
+      wav: "WAV",
+      flac: "FLAC",
+      m4a: "M4A",
+      "order-hint": "Files will be joined in upload order",
+      submit: "Merge Audio",
+      submitBatch: "Merge Audio ({count} files)",
+      progressLabel: "Merging audio",
+    },
+    "split-audio": {
+      mode: "Split mode",
+      time: "By time",
+      parts: "Equal parts",
+      silence: "By silence",
+      "segment-s": "Segment length (seconds)",
+      "num-parts": "Number of parts",
+      "threshold-db": "Silence threshold (dB)",
+      "min-silence-s": "Minimum silence duration (seconds)",
+      submit: "Split Audio",
+      submitBatch: "Split Audio ({count} files)",
+      progressLabel: "Splitting audio",
+    },
+    "ringtone-maker": {
+      "start-s": "Start time (seconds)",
+      "duration-s": "Duration (seconds)",
+      "max-hint": "Maximum 30 seconds",
+      submit: "Create Ringtone",
+      submitBatch: "Create Ringtone ({count} files)",
+      progressLabel: "Creating ringtone",
+    },
+    "waveform-image": {
+      width: "Width (px)",
+      height: "Height (px)",
+      color: "Waveform color",
+      submit: "Generate Waveform",
+      submitBatch: "Generate Waveform ({count} files)",
+      progressLabel: "Generating waveform",
+    },
+    "audio-metadata": {
+      strip: "Strip all metadata",
+      title: "Title",
+      artist: "Artist",
+      album: "Album",
+      submit: "Apply Metadata",
+      submitBatch: "Apply Metadata ({count} files)",
+      progressLabel: "Applying metadata",
+    },
     "merge-pdf": {
       addFiles: "Add PDFs to merge",
       needTwo: "At least two PDFs are required",
diff --git a/packages/shared/src/i18n/tr.ts b/packages/shared/src/i18n/tr.ts
index 0e59dddb..d56b389e 100644
--- a/packages/shared/src/i18n/tr.ts
+++ b/packages/shared/src/i18n/tr.ts
@@ -402,6 +402,62 @@ export const tr: TranslationKeys = {
       name: "Extract Audio",
       description: "Pull the audio track out of a video",
     },
+    "volume-adjust": {
+      name: "Volume Adjust",
+      description: "Increase or decrease audio volume by a fixed gain",
+    },
+    "normalize-audio": {
+      name: "Normalize Audio",
+      description: "Even out loudness to broadcast standard levels",
+    },
+    "fade-audio": {
+      name: "Fade Audio",
+      description: "Add fade-in and fade-out effects to audio",
+    },
+    "reverse-audio": {
+      name: "Reverse Audio",
+      description: "Play audio backwards",
+    },
+    "audio-speed": {
+      name: "Audio Speed",
+      description: "Speed up or slow down audio playback",
+    },
+    "pitch-shift": {
+      name: "Pitch Shift",
+      description: "Raise or lower pitch by semitones without changing speed",
+    },
+    "audio-channels": {
+      name: "Audio Channels",
+      description: "Convert between mono, stereo, or swap left and right channels",
+    },
+    "silence-removal": {
+      name: "Silence Removal",
+      description: "Strip silent sections from audio",
+    },
+    "noise-reduction": {
+      name: "Noise Reduction",
+      description: "Reduce background noise with FFT-based denoising",
+    },
+    "merge-audio": {
+      name: "Merge Audio",
+      description: "Combine multiple audio files into one",
+    },
+    "split-audio": {
+      name: "Split Audio",
+      description: "Split audio by time, equal parts, or silence detection",
+    },
+    "ringtone-maker": {
+      name: "Ringtone Maker",
+      description: "Create a ringtone clip from any audio file",
+    },
+    "waveform-image": {
+      name: "Waveform Image",
+      description: "Generate a waveform visualization as a PNG image",
+    },
+    "audio-metadata": {
+      name: "Audio Metadata",
+      description: "View, edit, or strip audio tags (ID3)",
+    },
     "merge-pdf": {
       name: "Merge PDFs",
       description: "Combine multiple PDFs into one",
@@ -1719,6 +1775,117 @@ export const tr: TranslationKeys = {
       submitBatch: "Extract ({count} files)",
       progressLabel: "Extracting",
     },
+    "volume-adjust": {
+      "gain-db": "Gain (dB)",
+      submit: "Adjust Volume",
+      submitBatch: "Adjust Volume ({count} files)",
+      progressLabel: "Adjusting volume",
+    },
+    "normalize-audio": {
+      hint: "EBU R128 loudness normalization",
+      submit: "Normalize",
+      submitBatch: "Normalize ({count} files)",
+      progressLabel: "Normalizing",
+    },
+    "fade-audio": {
+      "fade-in-s": "Fade in (seconds)",
+      "fade-out-s": "Fade out (seconds)",
+      submit: "Apply Fade",
+      submitBatch: "Apply Fade ({count} files)",
+      progressLabel: "Applying fade",
+    },
+    "reverse-audio": {
+      submit: "Reverse",
+      submitBatch: "Reverse ({count} files)",
+      progressLabel: "Reversing",
+    },
+    "audio-speed": {
+      factor: "Speed factor",
+      submit: "Change Speed",
+      submitBatch: "Change Speed ({count} files)",
+      progressLabel: "Changing speed",
+    },
+    "pitch-shift": {
+      semitones: "Semitones",
+      hint: "0 semitones is not allowed",
+      submit: "Shift Pitch",
+      submitBatch: "Shift Pitch ({count} files)",
+      progressLabel: "Shifting pitch",
+    },
+    "audio-channels": {
+      mode: "Channel mode",
+      "stereo-to-mono": "Stereo to mono",
+      "mono-to-stereo": "Mono to stereo",
+      swap: "Swap left/right",
+      submit: "Convert Channels",
+      submitBatch: "Convert Channels ({count} files)",
+      progressLabel: "Converting channels",
+    },
+    "silence-removal": {
+      "threshold-db": "Silence threshold (dB)",
+      "min-silence-s": "Minimum silence duration (seconds)",
+      submit: "Remove Silence",
+      submitBatch: "Remove Silence ({count} files)",
+      progressLabel: "Removing silence",
+    },
+    "noise-reduction": {
+      strength: "Strength",
+      light: "Light",
+      medium: "Medium",
+      strong: "Strong",
+      submit: "Reduce Noise",
+      submitBatch: "Reduce Noise ({count} files)",
+      progressLabel: "Reducing noise",
+    },
+    "merge-audio": {
+      format: "Output format",
+      mp3: "MP3",
+      wav: "WAV",
+      flac: "FLAC",
+      m4a: "M4A",
+      "order-hint": "Files will be joined in upload order",
+      submit: "Merge Audio",
+      submitBatch: "Merge Audio ({count} files)",
+      progressLabel: "Merging audio",
+    },
+    "split-audio": {
+      mode: "Split mode",
+      time: "By time",
+      parts: "Equal parts",
+      silence: "By silence",
+      "segment-s": "Segment length (seconds)",
+      "num-parts": "Number of parts",
+      "threshold-db": "Silence threshold (dB)",
+      "min-silence-s": "Minimum silence duration (seconds)",
+      submit: "Split Audio",
+      submitBatch: "Split Audio ({count} files)",
+      progressLabel: "Splitting audio",
+    },
+    "ringtone-maker": {
+      "start-s": "Start time (seconds)",
+      "duration-s": "Duration (seconds)",
+      "max-hint": "Maximum 30 seconds",
+      submit: "Create Ringtone",
+      submitBatch: "Create Ringtone ({count} files)",
+      progressLabel: "Creating ringtone",
+    },
+    "waveform-image": {
+      width: "Width (px)",
+      height: "Height (px)",
+      color: "Waveform color",
+      submit: "Generate Waveform",
+      submitBatch: "Generate Waveform ({count} files)",
+      progressLabel: "Generating waveform",
+    },
+    "audio-metadata": {
+      strip: "Strip all metadata",
+      title: "Title",
+      artist: "Artist",
+      album: "Album",
+      submit: "Apply Metadata",
+      submitBatch: "Apply Metadata ({count} files)",
+      progressLabel: "Applying metadata",
+    },
     "merge-pdf": {
       addFiles: "Add PDFs to merge",
       needTwo: "At least two PDFs are required",
diff --git a/packages/shared/src/i18n/uk.ts b/packages/shared/src/i18n/uk.ts
index 498594c4..152a7554 100644
--- a/packages/shared/src/i18n/uk.ts
+++ b/packages/shared/src/i18n/uk.ts
@@ -401,6 +401,62 @@ export const uk: TranslationKeys = {
       name: "Extract Audio",
       description: "Pull the audio track out of a video",
     },
+    "volume-adjust": {
+      name: "Volume Adjust",
+      description: "Increase or decrease audio volume by a fixed gain",
+    },
+    "normalize-audio": {
+      name: "Normalize Audio",
+      description: "Even out loudness to broadcast standard levels",
+    },
+    "fade-audio": {
+      name: "Fade Audio",
+      description: "Add fade-in and fade-out effects to audio",
+    },
+    "reverse-audio": {
+      name: "Reverse Audio",
+      description: "Play audio backwards",
+    },
+    "audio-speed": {
+      name: "Audio Speed",
+      description: "Speed up or slow down audio playback",
+    },
+    "pitch-shift": {
+      name: "Pitch Shift",
+      description: "Raise or lower pitch by semitones without changing speed",
+    },
+    "audio-channels": {
+      name: "Audio Channels",
+      description: "Convert between mono, stereo, or swap left and right channels",
+    },
+    "silence-removal": {
+      name: "Silence Removal",
+      description: "Strip silent sections from audio",
+    },
+    "noise-reduction": {
+      name: "Noise Reduction",
+      description: "Reduce background noise with FFT-based denoising",
+    },
+    "merge-audio": {
+      name: "Merge Audio",
+      description: "Combine multiple audio files into one",
+    },
+    "split-audio": {
+      name: "Split Audio",
+      description: "Split audio by time, equal parts, or silence detection",
+    },
+    "ringtone-maker": {
+      name: "Ringtone Maker",
+      description: "Create a ringtone clip from any audio file",
+    },
+    "waveform-image": {
+      name: "Waveform Image",
+      description: "Generate a waveform visualization as a PNG image",
+    },
+    "audio-metadata": {
+      name: "Audio Metadata",
+      description: "View, edit, or strip audio tags (ID3)",
+    },
     "merge-pdf": {
       name: "Merge PDFs",
       description: "Combine multiple PDFs into one",
@@ -1717,6 +1773,117 @@ export const uk: TranslationKeys = {
       submitBatch: "Extract ({count} files)",
       progressLabel: "Extracting",
     },
+    "volume-adjust": {
+      "gain-db": "Gain (dB)",
+      submit: "Adjust Volume",
+      submitBatch: "Adjust Volume ({count} files)",
+      progressLabel: "Adjusting volume",
+    },
+    "normalize-audio": {
+      hint: "EBU R128 loudness normalization",
+      submit: "Normalize",
+      submitBatch: "Normalize ({count} files)",
+      progressLabel: "Normalizing",
+    },
+    "fade-audio": {
+      "fade-in-s": "Fade in (seconds)",
+      "fade-out-s": "Fade out (seconds)",
+      submit: "Apply Fade",
+      submitBatch: "Apply Fade ({count} files)",
+      progressLabel: "Applying fade",
+    },
+    "reverse-audio": {
+      submit: "Reverse",
+      submitBatch: "Reverse ({count} files)",
+      progressLabel: "Reversing",
+    },
+    "audio-speed": {
+      factor: "Speed factor",
+      submit: "Change Speed",
+      submitBatch: "Change Speed ({count} files)",
+      progressLabel: "Changing speed",
+    },
+    "pitch-shift": {
+      semitones: "Semitones",
+      hint: "0 semitones is not allowed",
+      submit: "Shift Pitch",
+      submitBatch: "Shift Pitch ({count} files)",
+      progressLabel: "Shifting pitch",
+    },
+    "audio-channels": {
+      mode: "Channel mode",
+      "stereo-to-mono": "Stereo to mono",
+      "mono-to-stereo": "Mono to stereo",
+      swap: "Swap left/right",
+      submit: "Convert Channels",
+      submitBatch: "Convert Channels ({count} files)",
+      progressLabel: "Converting channels",
+    },
+    "silence-removal": {
+      "threshold-db": "Silence threshold (dB)",
+      "min-silence-s": "Minimum silence duration (seconds)",
+      submit: "Remove Silence",
+      submitBatch: "Remove Silence ({count} files)",
+      progressLabel: "Removing silence",
+    },
+    "noise-reduction": {
+      strength: "Strength",
+      light: "Light",
+      medium: "Medium",
+      strong: "Strong",
+      submit: "Reduce Noise",
+      submitBatch: "Reduce Noise ({count} files)",
+      progressLabel: "Reducing noise",
+    },
+    "merge-audio": {
+      format: "Output format",
+      mp3: "MP3",
+      wav: "WAV",
+      flac: "FLAC",
+      m4a: "M4A",
+      "order-hint": "Files will be joined in upload order",
+      submit: "Merge Audio",
+      submitBatch: "Merge Audio ({count} files)",
+      progressLabel: "Merging audio",
+    },
+    "split-audio": {
+      mode: "Split mode",
+      time: "By time",
+      parts: "Equal parts",
+      silence: "By silence",
+      "segment-s": "Segment length (seconds)",
+      "num-parts": "Number of parts",
+      "threshold-db": "Silence threshold (dB)",
+      "min-silence-s": "Minimum silence duration (seconds)",
+      submit: "Split Audio",
+      submitBatch: "Split Audio ({count} files)",
+      progressLabel: "Splitting audio",
+    },
+    "ringtone-maker": {
+      "start-s": "Start time (seconds)",
+      "duration-s": "Duration (seconds)",
+      "max-hint": "Maximum 30 seconds",
+      submit: "Create Ringtone",
+      submitBatch: "Create Ringtone ({count} files)",
+      progressLabel: "Creating ringtone",
+    },
+    "waveform-image": {
+      width: "Width (px)",
+      height: "Height (px)",
+      color: "Waveform color",
+      submit: "Generate Waveform",
+      submitBatch: "Generate Waveform ({count} files)",
+      progressLabel: "Generating waveform",
+    },
+    "audio-metadata": {
+      strip: "Strip all metadata",
+      title: "Title",
+      artist: "Artist",
+      album: "Album",
+      submit: "Apply Metadata",
+      submitBatch: "Apply Metadata ({count} files)",
+      progressLabel: "Applying metadata",
+    },
     "merge-pdf": {
       addFiles: "Add PDFs to merge",
       needTwo: "At least two PDFs are required",
diff --git a/packages/shared/src/i18n/vi.ts b/packages/shared/src/i18n/vi.ts
index 02ab12b7..1793f0eb 100644
--- a/packages/shared/src/i18n/vi.ts
+++ b/packages/shared/src/i18n/vi.ts
@@ -402,6 +402,62 @@ export const vi: TranslationKeys = {
       name: "Extract Audio",
       description: "Pull the audio track out of a video",
     },
+    "volume-adjust": {
+      name: "Volume Adjust",
+      description: "Increase or decrease audio volume by a fixed gain",
+    },
+    "normalize-audio": {
+      name: "Normalize Audio",
+      description: "Even out loudness to broadcast standard levels",
+    },
+    "fade-audio": {
+      name: "Fade Audio",
+      description: "Add fade-in and fade-out effects to audio",
+    },
+    "reverse-audio": {
+      name: "Reverse Audio",
+      description: "Play audio backwards",
+    },
+    "audio-speed": {
+      name: "Audio Speed",
+      description: "Speed up or slow down audio playback",
+    },
+    "pitch-shift": {
+      name: "Pitch Shift",
+      description: "Raise or lower pitch by semitones without changing speed",
+    },
+    "audio-channels": {
+      name: "Audio Channels",
+      description: "Convert between mono, stereo, or swap left and right channels",
+    },
+    "silence-removal": {
+      name: "Silence Removal",
+      description: "Strip silent sections from audio",
+    },
+    "noise-reduction": {
+      name: "Noise Reduction",
+      description: "Reduce background noise with FFT-based denoising",
+    },
+    "merge-audio": {
+      name: "Merge Audio",
+      description: "Combine multiple audio files into one",
+    },
+    "split-audio": {
+      name: "Split Audio",
+      description: "Split audio by time, equal parts, or silence detection",
+    },
+    "ringtone-maker": {
+      name: "Ringtone Maker",
+      description: "Create a ringtone clip from any audio file",
+    },
+    "waveform-image": {
+      name: "Waveform Image",
+      description: "Generate a waveform visualization as a PNG image",
+    },
+    "audio-metadata": {
+      name: "Audio Metadata",
+      description: "View, edit, or strip audio tags (ID3)",
+    },
     "merge-pdf": {
       name: "Merge PDFs",
       description: "Combine multiple PDFs into one",
@@ -1716,6 +1772,117 @@ export const vi: TranslationKeys = {
       submitBatch: "Extract ({count} files)",
       progressLabel: "Extracting",
     },
+    "volume-adjust": {
+      "gain-db": "Gain (dB)",
+      submit: "Adjust Volume",
+      submitBatch: "Adjust Volume ({count} files)",
+      progressLabel: "Adjusting volume",
+    },
+    "normalize-audio": {
+      hint: "EBU R128 loudness normalization",
+      submit: "Normalize",
+      submitBatch: "Normalize ({count} files)",
+      progressLabel: "Normalizing",
+    },
+    "fade-audio": {
+      "fade-in-s": "Fade in (seconds)",
+      "fade-out-s": "Fade out (seconds)",
+      submit: "Apply Fade",
+      submitBatch: "Apply Fade ({count} files)",
+      progressLabel: "Applying fade",
+    },
+    "reverse-audio": {
+      submit: "Reverse",
+      submitBatch: "Reverse ({count} files)",
+      progressLabel: "Reversing",
+    },
+    "audio-speed": {
+      factor: "Speed factor",
+      submit: "Change Speed",
+      submitBatch: "Change Speed ({count} files)",
+      progressLabel: "Changing speed",
+    },
+    "pitch-shift": {
+      semitones: "Semitones",
+      hint: "0 semitones is not allowed",
+      submit: "Shift Pitch",
+      submitBatch: "Shift Pitch ({count} files)",
+      progressLabel: "Shifting pitch",
+    },
+    "audio-channels": {
+      mode: "Channel mode",
+      "stereo-to-mono": "Stereo to mono",
+      "mono-to-stereo": "Mono to stereo",
+      swap: "Swap left/right",
+      submit: "Convert Channels",
+      submitBatch: "Convert Channels ({count} files)",
+      progressLabel: "Converting channels",
+    },
+    "silence-removal": {
+      "threshold-db": "Silence threshold (dB)",
+      "min-silence-s": "Minimum silence duration (seconds)",
+      submit: "Remove Silence",
+      submitBatch: "Remove Silence ({count} files)",
+      progressLabel: "Removing silence",
+    },
+    "noise-reduction": {
+      strength: "Strength",
+      light: "Light",
+      medium: "Medium",
+      strong: "Strong",
+      submit: "Reduce Noise",
+      submitBatch: "Reduce Noise ({count} files)",
+      progressLabel: "Reducing noise",
+    },
+    "merge-audio": {
+      format: "Output format",
+      mp3: "MP3",
+      wav: "WAV",
+      flac: "FLAC",
+      m4a: "M4A",
+      "order-hint": "Files will be joined in upload order",
+      submit: "Merge Audio",
+      submitBatch: "Merge Audio ({count} files)",
+      progressLabel: "Merging audio",
+    },
+    "split-audio": {
+      mode: "Split mode",
+      time: "By time",
+      parts: "Equal parts",
+      silence: "By silence",
+      "segment-s": "Segment length (seconds)",
+      "num-parts": "Number of parts",
+      "threshold-db": "Silence threshold (dB)",
+      "min-silence-s": "Minimum silence duration (seconds)",
+      submit: "Split Audio",
+      submitBatch: "Split Audio ({count} files)",
+      progressLabel: "Splitting audio",
+    },
+    "ringtone-maker": {
+      "start-s": "Start time (seconds)",
+      "duration-s": "Duration (seconds)",
+      "max-hint": "Maximum 30 seconds",
+      submit: "Create Ringtone",
+      submitBatch: "Create Ringtone ({count} files)",
+      progressLabel: "Creating ringtone",
+    },
+    "waveform-image": {
+      width: "Width (px)",
+      height: "Height (px)",
+      color: "Waveform color",
+      submit: "Generate Waveform",
+      submitBatch: "Generate Waveform ({count} files)",
+      progressLabel: "Generating waveform",
+    },
+    "audio-metadata": {
+      strip: "Strip all metadata",
+      title: "Title",
+      artist: "Artist",
+      album: "Album",
+      submit: "Apply Metadata",
+      submitBatch: "Apply Metadata ({count} files)",
+      progressLabel: "Applying metadata",
+    },
     "merge-pdf": {
       addFiles: "Add PDFs to merge",
       needTwo: "At least two PDFs are required",
diff --git a/packages/shared/src/i18n/zh-CN.ts b/packages/shared/src/i18n/zh-CN.ts
index 03c08481..9dbee9bd 100644
--- a/packages/shared/src/i18n/zh-CN.ts
+++ b/packages/shared/src/i18n/zh-CN.ts
@@ -351,6 +351,62 @@ export const zhCN: TranslationKeys = {
       name: "Extract Audio",
       description: "Pull the audio track out of a video",
     },
+    "volume-adjust": {
+      name: "Volume Adjust",
+      description: "Increase or decrease audio volume by a fixed gain",
+    },
+    "normalize-audio": {
+      name: "Normalize Audio",
+      description: "Even out loudness to broadcast standard levels",
+    },
+    "fade-audio": {
+      name: "Fade Audio",
+      description: "Add fade-in and fade-out effects to audio",
+    },
+    "reverse-audio": {
+      name: "Reverse Audio",
+      description: "Play audio backwards",
+    },
+    "audio-speed": {
+      name: "Audio Speed",
+      description: "Speed up or slow down audio playback",
+    },
+    "pitch-shift": {
+      name: "Pitch Shift",
+      description: "Raise or lower pitch by semitones without changing speed",
+    },
+    "audio-channels": {
+      name: "Audio Channels",
+      description: "Convert between mono, stereo, or swap left and right channels",
+    },
+    "silence-removal": {
+      name: "Silence Removal",
+      description: "Strip silent sections from audio",
+    },
+    "noise-reduction": {
+      name: "Noise Reduction",
+      description: "Reduce background noise with FFT-based denoising",
+    },
+    "merge-audio": {
+      name: "Merge Audio",
+      description: "Combine multiple audio files into one",
+    },
+    "split-audio": {
+      name: "Split Audio",
+      description: "Split audio by time, equal parts, or silence detection",
+    },
+    "ringtone-maker": {
+      name: "Ringtone Maker",
+      description: "Create a ringtone clip from any audio file",
+    },
+    "waveform-image": {
+      name: "Waveform Image",
+      description: "Generate a waveform visualization as a PNG image",
+    },
+    "audio-metadata": {
+      name: "Audio Metadata",
+      description: "View, edit, or strip audio tags (ID3)",
+    },
     "merge-pdf": {
       name: "Merge PDFs",
       description: "Combine multiple PDFs into one",
@@ -1651,6 +1707,117 @@ export const zhCN: TranslationKeys = {
       submitBatch: "Extract ({count} files)",
       progressLabel: "Extracting",
     },
+    "volume-adjust": {
+      "gain-db": "Gain (dB)",
+      submit: "Adjust Volume",
+      submitBatch: "Adjust Volume ({count} files)",
+      progressLabel: "Adjusting volume",
+    },
+    "normalize-audio": {
+      hint: "EBU R128 loudness normalization",
+      submit: "Normalize",
+      submitBatch: "Normalize ({count} files)",
+      progressLabel: "Normalizing",
+    },
+    "fade-audio": {
+      "fade-in-s": "Fade in (seconds)",
+      "fade-out-s": "Fade out (seconds)",
+      submit: "Apply Fade",
+      submitBatch: "Apply Fade ({count} files)",
+      progressLabel: "Applying fade",
+    },
+    "reverse-audio": {
+      submit: "Reverse",
+      submitBatch: "Reverse ({count} files)",
+      progressLabel: "Reversing",
+    },
+    "audio-speed": {
+      factor: "Speed factor",
+      submit: "Change Speed",
+      submitBatch: "Change Speed ({count} files)",
+      progressLabel: "Changing speed",
+    },
+    "pitch-shift": {
+      semitones: "Semitones",
+      hint: "0 semitones is not allowed",
+      submit: "Shift Pitch",
+      submitBatch: "Shift Pitch ({count} files)",
+      progressLabel: "Shifting pitch",
+    },
+    "audio-channels": {
+      mode: "Channel mode",
+      "stereo-to-mono": "Stereo to mono",
+      "mono-to-stereo": "Mono to stereo",
+      swap: "Swap left/right",
+      submit: "Convert Channels",
+      submitBatch: "Convert Channels ({count} files)",
+      progressLabel: "Converting channels",
+    },
+    "silence-removal": {
+      "threshold-db": "Silence threshold (dB)",
+      "min-silence-s": "Minimum silence duration (seconds)",
+      submit: "Remove Silence",
+      submitBatch: "Remove Silence ({count} files)",
+      progressLabel: "Removing silence",
+    },
+    "noise-reduction": {
+      strength: "Strength",
+      light: "Light",
+      medium: "Medium",
+      strong: "Strong",
+      submit: "Reduce Noise",
+      submitBatch: "Reduce Noise ({count} files)",
+      progressLabel: "Reducing noise",
+    },
+    "merge-audio": {
+      format: "Output format",
+      mp3: "MP3",
+      wav: "WAV",
+      flac: "FLAC",
+      m4a: "M4A",
+      "order-hint": "Files will be joined in upload order",
+      submit: "Merge Audio",
+      submitBatch: "Merge Audio ({count} files)",
+      progressLabel: "Merging audio",
+    },
+    "split-audio": {
+      mode: "Split mode",
+      time: "By time",
+      parts: "Equal parts",
+      silence: "By silence",
+      "segment-s": "Segment length (seconds)",
+      "num-parts": "Number of parts",
+      "threshold-db": "Silence threshold (dB)",
+      "min-silence-s": "Minimum silence duration (seconds)",
+      submit: "Split Audio",
+      submitBatch: "Split Audio ({count} files)",
+      progressLabel: "Splitting audio",
+    },
+    "ringtone-maker": {
+      "start-s": "Start time (seconds)",
+      "duration-s": "Duration (seconds)",
+      "max-hint": "Maximum 30 seconds",
+      submit: "Create Ringtone",
+      submitBatch: "Create Ringtone ({count} files)",
+      progressLabel: "Creating ringtone",
+    },
+    "waveform-image": {
+      width: "Width (px)",
+      height: "Height (px)",
+      color: "Waveform color",
+      submit: "Generate Waveform",
+      submitBatch: "Generate Waveform ({count} files)",
+      progressLabel: "Generating waveform",
+    },
+    "audio-metadata": {
+      strip: "Strip all metadata",
+      title: "Title",
+      artist: "Artist",
+      album: "Album",
+      submit: "Apply Metadata",
+      submitBatch: "Apply Metadata ({count} files)",
+      progressLabel: "Applying metadata",
+    },
     "merge-pdf": {
       addFiles: "Add PDFs to merge",
       needTwo: "At least two PDFs are required",
diff --git a/packages/shared/src/i18n/zh-TW.ts b/packages/shared/src/i18n/zh-TW.ts
index 82d94e62..07b6d89b 100644
--- a/packages/shared/src/i18n/zh-TW.ts
+++ b/packages/shared/src/i18n/zh-TW.ts
@@ -350,6 +350,62 @@ export const zhTW: TranslationKeys = {
       name: "Extract Audio",
       description: "Pull the audio track out of a video",
     },
+    "volume-adjust": {
+      name: "Volume Adjust",
+      description: "Increase or decrease audio volume by a fixed gain",
+    },
+    "normalize-audio": {
+      name: "Normalize Audio",
+      description: "Even out loudness to broadcast standard levels",
+    },
+    "fade-audio": {
+      name: "Fade Audio",
+      description: "Add fade-in and fade-out effects to audio",
+    },
+    "reverse-audio": {
+      name: "Reverse Audio",
+      description: "Play audio backwards",
+    },
+    "audio-speed": {
+      name: "Audio Speed",
+      description: "Speed up or slow down audio playback",
+    },
+    "pitch-shift": {
+      name: "Pitch Shift",
+      description: "Raise or lower pitch by semitones without changing speed",
+    },
+    "audio-channels": {
+      name: "Audio Channels",
+      description: "Convert between mono, stereo, or swap left and right channels",
+    },
+    "silence-removal": {
+      name: "Silence Removal",
+      description: "Strip silent sections from audio",
+    },
+    "noise-reduction": {
+      name: "Noise Reduction",
+      description: "Reduce background noise with FFT-based denoising",
+    },
+    "merge-audio": {
+      name: "Merge Audio",
+      description: "Combine multiple audio files into one",
+    },
+    "split-audio": {
+      name: "Split Audio",
+      description: "Split audio by time, equal parts, or silence detection",
+    },
+    "ringtone-maker": {
+      name: "Ringtone Maker",
+      description: "Create a ringtone clip from any audio file",
+    },
+    "waveform-image": {
+      name: "Waveform Image",
+      description: "Generate a waveform visualization as a PNG image",
+    },
+    "audio-metadata": {
+      name: "Audio Metadata",
+      description: "View, edit, or strip audio tags (ID3)",
+    },
     "merge-pdf": {
       name: "Merge PDFs",
       description: "Combine multiple PDFs into one",
@@ -1649,6 +1705,117 @@ export const zhTW: TranslationKeys = {
       submitBatch: "Extract ({count} files)",
       progressLabel: "Extracting",
     },
+    "volume-adjust": {
+      "gain-db": "Gain (dB)",
+      submit: "Adjust Volume",
+      submitBatch: "Adjust Volume ({count} files)",
+      progressLabel: "Adjusting volume",
+    },
+    "normalize-audio": {
+      hint: "EBU R128 loudness normalization",
+      submit: "Normalize",
+      submitBatch: "Normalize ({count} files)",
+      progressLabel: "Normalizing",
+    },
+    "fade-audio": {
+      "fade-in-s": "Fade in (seconds)",
+      "fade-out-s": "Fade out (seconds)",
+      submit: "Apply Fade",
+      submitBatch: "Apply Fade ({count} files)",
+      progressLabel: "Applying fade",
+    },
+    "reverse-audio": {
+      submit: "Reverse",
+      submitBatch: "Reverse ({count} files)",
+      progressLabel: "Reversing",
+    },
+    "audio-speed": {
+      factor: "Speed factor",
+      submit: "Change Speed",
+      submitBatch: "Change Speed ({count} files)",
+      progressLabel: "Changing speed",
+    },
+    "pitch-shift": {
+      semitones: "Semitones",
+      hint: "0 semitones is not allowed",
+      submit: "Shift Pitch",
+      submitBatch: "Shift Pitch ({count} files)",
+      progressLabel: "Shifting pitch",
+    },
+    "audio-channels": {
+      mode: "Channel mode",
+      "stereo-to-mono": "Stereo to mono",
+      "mono-to-stereo": "Mono to stereo",
+      swap: "Swap left/right",
+      submit: "Convert Channels",
+      submitBatch: "Convert Channels ({count} files)",
+      progressLabel: "Converting channels",
+    },
+    "silence-removal": {
+      "threshold-db": "Silence threshold (dB)",
+      "min-silence-s": "Minimum silence duration (seconds)",
+      submit: "Remove Silence",
+      submitBatch: "Remove Silence ({count} files)",
+      progressLabel: "Removing silence",
+    },
+    "noise-reduction": {
+      strength: "Strength",
+      light: "Light",
+      medium: "Medium",
+      strong: "Strong",
+      submit: "Reduce Noise",
+      submitBatch: "Reduce Noise ({count} files)",
+      progressLabel: "Reducing noise",
+    },
+    "merge-audio": {
+      format: "Output format",
+      mp3: "MP3",
+      wav: "WAV",
+      flac: "FLAC",
+      m4a: "M4A",
+      "order-hint": "Files will be joined in upload order",
+      submit: "Merge Audio",
+      submitBatch: "Merge Audio ({count} files)",
+      progressLabel: "Merging audio",
+    },
+    "split-audio": {
+      mode: "Split mode",
+      time: "By time",
+      parts: "Equal parts",
+      silence: "By silence",
+      "segment-s": "Segment length (seconds)",
+      "num-parts": "Number of parts",
+      "threshold-db": "Silence threshold (dB)",
+      "min-silence-s": "Minimum silence duration (seconds)",
+      submit: "Split Audio",
+      submitBatch: "Split Audio ({count} files)",
+      progressLabel: "Splitting audio",
+    },
+    "ringtone-maker": {
+      "start-s": "Start time (seconds)",
+      "duration-s": "Duration (seconds)",
+      "max-hint": "Maximum 30 seconds",
+      submit: "Create Ringtone",
+      submitBatch: "Create Ringtone ({count} files)",
+      progressLabel: "Creating ringtone",
+    },
+    "waveform-image": {
+      width: "Width (px)",
+      height: "Height (px)",
+      color: "Waveform color",
+      submit: "Generate Waveform",
+      submitBatch: "Generate Waveform ({count} files)",
+      progressLabel: "Generating waveform",
+    },
+    "audio-metadata": {
+      strip: "Strip all metadata",
+      title: "Title",
+      artist: "Artist",
+      album: "Album",
+      submit: "Apply Metadata",
+      submitBatch: "Apply Metadata ({count} files)",
+      progressLabel: "Applying metadata",
+    },
     "merge-pdf": {
       addFiles: "Add PDFs to merge",
       needTwo: "At least two PDFs are required",
diff --git a/tests/fixtures/media/tone-gap.wav b/tests/fixtures/media/tone-gap.wav
new file mode 100644
index 00000000..450e6c97
Binary files /dev/null and b/tests/fixtures/media/tone-gap.wav differ
diff --git a/tests/fixtures/media/tone-stereo.wav b/tests/fixtures/media/tone-stereo.wav
new file mode 100644
index 00000000..7224c760
Binary files /dev/null and b/tests/fixtures/media/tone-stereo.wav differ
diff --git a/tests/helpers/tool-default-settings.ts b/tests/helpers/tool-default-settings.ts
index 2bc8ca6d..edcaf896 100644
--- a/tests/helpers/tool-default-settings.ts
+++ b/tests/helpers/tool-default-settings.ts
@@ -29,6 +29,7 @@ export const TOOL_SETTINGS_OVERRIDES: Record<string, unknown> = {
   "rotate-video": { transform: "cw90" },
   "resize-video": { preset: "720p" },
   "watermark-video": { text: "CONFIDENTIAL" },
+  "audio-channels": { mode: "mono-to-stereo" },
 };
 
 export function defaultSettingsFor(toolId: string): unknown {
diff --git a/tests/integration/audio-channels.test.ts b/tests/integration/audio-channels.test.ts
new file mode 100644
index 00000000..52ae8bac
--- /dev/null
+++ b/tests/integration/audio-channels.test.ts
@@ -0,0 +1,86 @@
+import { mkdtempSync, readFileSync, writeFileSync } from "node:fs";
+import { tmpdir } from "node:os";
+import { join } from "node:path";
+import { ffmpegAvailable, probeMedia } from "@snapotter/media-engine";
+import { afterAll, beforeAll, describe, expect, it } from "vitest";
+import { buildTestApp, createMultipartPayload, loginAsAdmin, type TestApp } from "./test-server.js";
+
+const STEREO = readFileSync(join(__dirname, "..", "fixtures", "media", "tone-stereo.wav"));
+const MONO_MP3 = readFileSync(join(__dirname, "..", "fixtures", "media", "tiny.mp3"));
+
+let testApp: TestApp;
+let adminToken: string;
+
+beforeAll(async () => {
+  testApp = await buildTestApp();
+  adminToken = await loginAsAdmin(testApp.app);
+}, 30_000);
+
+afterAll(async () => {
+  await testApp.cleanup();
+}, 10_000);
+
+function postTool(
+  filename: string,
+  contentTypeHeader: string,
+  fileContent: Buffer,
+  settings: Record<string, unknown>,
+) {
+  const { body, contentType } = createMultipartPayload([
+    { name: "file", filename, contentType: contentTypeHeader, content: fileContent },
+    { name: "settings", content: JSON.stringify(settings) },
+  ]);
+  return testApp.app.inject({
+    method: "POST",
+    url: "/api/v1/tools/audio-channels",
+    headers: { authorization: `Bearer ${adminToken}`, "content-type": contentType },
+    body,
+  });
+}
+
+describe.skipIf(!ffmpegAvailable())("audio-channels (requires ffmpeg)", () => {
+  it("stereo-to-mono on stereo file produces mono output", async () => {
+    const res = await postTool("tone-stereo.wav", "audio/wav", STEREO, {
+      mode: "stereo-to-mono",
+    });
+    expect(res.statusCode).toBe(200);
+    const envelope = JSON.parse(res.body);
+    const dl = await testApp.app.inject({ method: "GET", url: envelope.downloadUrl });
+    expect(dl.statusCode).toBe(200);
+
+    const tmpDir = mkdtempSync(join(tmpdir(), "ch-test-"));
+    const probeFile = join(tmpDir, "mono.wav");
+    writeFileSync(probeFile, dl.rawPayload);
+    const info = await probeMedia(probeFile);
+    const audio = info.streams.find((s) => s.type === "audio");
+    expect(audio?.channels).toBe(1);
+  }, 60_000);
+
+  it("swap on stereo file returns 200 with 2 channels", async () => {
+    const res = await postTool("tone-stereo.wav", "audio/wav", STEREO, { mode: "swap" });
+    expect(res.statusCode).toBe(200);
+    const envelope = JSON.parse(res.body);
+    const dl = await testApp.app.inject({ method: "GET", url: envelope.downloadUrl });
+
+    const tmpDir = mkdtempSync(join(tmpdir(), "ch-test-"));
+    const probeFile = join(tmpDir, "swapped.wav");
+    writeFileSync(probeFile, dl.rawPayload);
+    const info = await probeMedia(probeFile);
+    const audio = info.streams.find((s) => s.type === "audio");
+    expect(audio?.channels).toBe(2);
+  }, 60_000);
+
+  it("stereo-to-mono on mono input returns 422", async () => {
+    const res = await postTool("tiny.mp3", "audio/mpeg", MONO_MP3, {
+      mode: "stereo-to-mono",
+    });
+    expect(res.statusCode).toBe(422);
+    const body = JSON.parse(res.body);
+    expect(body.details).toMatch(/stereo input/i);
+  }, 60_000);
+
+  it("rejects missing mode (400)", async () => {
+    const res = await postTool("tone-stereo.wav", "audio/wav", STEREO, {});
+    expect(res.statusCode).toBe(400);
+  });
+});
diff --git a/tests/integration/audio-metadata.test.ts b/tests/integration/audio-metadata.test.ts
new file mode 100644
index 00000000..3e0c1bc1
--- /dev/null
+++ b/tests/integration/audio-metadata.test.ts
@@ -0,0 +1,68 @@
+import { mkdtempSync, readFileSync, writeFileSync } from "node:fs";
+import { tmpdir } from "node:os";
+import { join } from "node:path";
+import { ffmpegAvailable, probeMedia } from "@snapotter/media-engine";
+import { afterAll, beforeAll, describe, expect, it } from "vitest";
+import { buildTestApp, createMultipartPayload, loginAsAdmin, type TestApp } from "./test-server.js";
+
+const MP3 = readFileSync(join(__dirname, "..", "fixtures", "media", "tiny.mp3"));
+
+let testApp: TestApp;
+let adminToken: string;
+
+beforeAll(async () => {
+  testApp = await buildTestApp();
+  adminToken = await loginAsAdmin(testApp.app);
+}, 30_000);
+
+afterAll(async () => {
+  await testApp.cleanup();
+}, 10_000);
+
+async function runTool(settings: Record<string, unknown>) {
+  const { body, contentType } = createMultipartPayload([
+    { name: "file", filename: "tiny.mp3", contentType: "audio/mpeg", content: MP3 },
+    { name: "settings", content: JSON.stringify(settings) },
+  ]);
+  return testApp.app.inject({
+    method: "POST",
+    url: "/api/v1/tools/audio-metadata",
+    headers: { authorization: `Bearer ${adminToken}`, "content-type": contentType },
+    body,
+  });
+}
+
+describe.skipIf(!ffmpegAvailable())("audio-metadata (requires ffmpeg)", () => {
+  it("sets title tag and envelope contains metadata with tags object", async () => {
+    const res = await runTool({ title: "EnvelopeTitle2026" });
+    expect(res.statusCode).toBe(200);
+    const envelope = JSON.parse(res.body);
+    expect(envelope.downloadUrl).toBeDefined();
+
+    // Envelope carries resultPayload.metadata at top level (sync passthrough)
+    expect(envelope.metadata).toBeDefined();
+    expect(typeof envelope.metadata.tags).toBe("object");
+
+    // Download and probe the output to verify the tag was written
+    const dl = await testApp.app.inject({ method: "GET", url: envelope.downloadUrl });
+    expect(dl.statusCode).toBe(200);
+
+    const tmpDir = mkdtempSync(join(tmpdir(), "audio-meta-"));
+    const probeFile = join(tmpDir, "tagged.mp3");
+    writeFileSync(probeFile, dl.rawPayload);
+    const info = await probeMedia(probeFile);
+    expect(info.tags?.title).toBe("EnvelopeTitle2026");
+  }, 60_000);
+
+  it("strips metadata with strip true and returns 200", async () => {
+    const res = await runTool({ strip: true });
+    expect(res.statusCode).toBe(200);
+    const envelope = JSON.parse(res.body);
+    expect(envelope.downloadUrl).toBeDefined();
+  }, 60_000);
+
+  it("rejects title exceeding 500 characters (400)", async () => {
+    const res = await runTool({ title: "x".repeat(501) });
+    expect(res.statusCode).toBe(400);
+  });
+});
diff --git a/tests/integration/audio-speed.test.ts b/tests/integration/audio-speed.test.ts
new file mode 100644
index 00000000..489d38b6
--- /dev/null
+++ b/tests/integration/audio-speed.test.ts
@@ -0,0 +1,60 @@
+import { mkdtempSync, readFileSync, writeFileSync } from "node:fs";
+import { tmpdir } from "node:os";
+import { join } from "node:path";
+import { ffmpegAvailable, probeMedia } from "@snapotter/media-engine";
+import { afterAll, beforeAll, describe, expect, it } from "vitest";
+import { buildTestApp, createMultipartPayload, loginAsAdmin, type TestApp } from "./test-server.js";
+
+const MP3 = readFileSync(join(__dirname, "..", "fixtures", "media", "tiny.mp3"));
+
+let testApp: TestApp;
+let adminToken: string;
+
+beforeAll(async () => {
+  testApp = await buildTestApp();
+  adminToken = await loginAsAdmin(testApp.app);
+}, 30_000);
+
+afterAll(async () => {
+  await testApp.cleanup();
+}, 10_000);
+
+async function runTool(settings: Record<string, unknown>) {
+  const { body, contentType } = createMultipartPayload([
+    { name: "file", filename: "tiny.mp3", contentType: "audio/mpeg", content: MP3 },
+    { name: "settings", content: JSON.stringify(settings) },
+  ]);
+  return testApp.app.inject({
+    method: "POST",
+    url: "/api/v1/tools/audio-speed",
+    headers: { authorization: `Bearer ${adminToken}`, "content-type": contentType },
+    body,
+  });
+}
+
+describe.skipIf(!ffmpegAvailable())("audio-speed (requires ffmpeg)", () => {
+  it("doubles speed and halves duration", async () => {
+    const res = await runTool({ factor: 2 });
+    expect(res.statusCode).toBe(200);
+    const envelope = JSON.parse(res.body);
+    expect(envelope.downloadUrl).toBeDefined();
+
+    const dl = await testApp.app.inject({ method: "GET", url: envelope.downloadUrl });
+    expect(dl.statusCode).toBe(200);
+
+    const tmpDir = mkdtempSync(join(tmpdir(), "aspeed-test-"));
+    const probeFile = join(tmpDir, "sped.mp3");
+    writeFileSync(probeFile, dl.rawPayload);
+    const info = await probeMedia(probeFile);
+
+    // tiny.mp3 is ~1.044s; at 2x speed output should be ~0.522s (within 25%)
+    const expected = 1.044 / 2;
+    expect(info.durationS).toBeGreaterThan(expected * 0.75);
+    expect(info.durationS).toBeLessThan(expected * 1.25);
+  }, 60_000);
+
+  it("rejects factor out of range", async () => {
+    const res = await runTool({ factor: 10 });
+    expect(res.statusCode).toBe(400);
+  });
+});
diff --git a/tests/integration/fade-audio.test.ts b/tests/integration/fade-audio.test.ts
new file mode 100644
index 00000000..e4d14002
--- /dev/null
+++ b/tests/integration/fade-audio.test.ts
@@ -0,0 +1,52 @@
+import { readFileSync } from "node:fs";
+import { join } from "node:path";
+import { ffmpegAvailable } from "@snapotter/media-engine";
+import { afterAll, beforeAll, describe, expect, it } from "vitest";
+import { buildTestApp, createMultipartPayload, loginAsAdmin, type TestApp } from "./test-server.js";
+
+const MP3 = readFileSync(join(__dirname, "..", "fixtures", "media", "tiny.mp3"));
+
+let testApp: TestApp;
+let adminToken: string;
+
+beforeAll(async () => {
+  testApp = await buildTestApp();
+  adminToken = await loginAsAdmin(testApp.app);
+}, 30_000);
+
+afterAll(async () => {
+  await testApp.cleanup();
+}, 10_000);
+
+async function runTool(settings: Record<string, unknown>) {
+  const { body, contentType } = createMultipartPayload([
+    { name: "file", filename: "tiny.mp3", contentType: "audio/mpeg", content: MP3 },
+    { name: "settings", content: JSON.stringify(settings) },
+  ]);
+  return testApp.app.inject({
+    method: "POST",
+    url: "/api/v1/tools/fade-audio",
+    headers: { authorization: `Bearer ${adminToken}`, "content-type": contentType },
+    body,
+  });
+}
+
+describe.skipIf(!ffmpegAvailable())("fade-audio (requires ffmpeg)", () => {
+  it("applies default fades and returns 200", async () => {
+    const res = await runTool({ fadeInS: 1, fadeOutS: 1 });
+    expect(res.statusCode).toBe(200);
+    const envelope = JSON.parse(res.body);
+    expect(envelope.downloadUrl).toBeDefined();
+    const dl = await testApp.app.inject({
+      method: "GET",
+      url: envelope.downloadUrl,
+    });
+    expect(dl.statusCode).toBe(200);
+    expect(dl.rawPayload.length).toBeGreaterThan(100);
+  }, 60_000);
+
+  it("rejects when both fades are 0", async () => {
+    const res = await runTool({ fadeInS: 0, fadeOutS: 0 });
+    expect(res.statusCode).toBe(400);
+  });
+});
diff --git a/tests/integration/merge-audio.test.ts b/tests/integration/merge-audio.test.ts
new file mode 100644
index 00000000..cdea1cb3
--- /dev/null
+++ b/tests/integration/merge-audio.test.ts
@@ -0,0 +1,70 @@
+import { mkdtempSync, readFileSync, writeFileSync } from "node:fs";
+import { tmpdir } from "node:os";
+import { join } from "node:path";
+import { ffmpegAvailable, probeMedia } from "@snapotter/media-engine";
+import { afterAll, beforeAll, describe, expect, it } from "vitest";
+import { buildTestApp, createMultipartPayload, loginAsAdmin, type TestApp } from "./test-server.js";
+
+const MP3 = readFileSync(join(__dirname, "..", "fixtures", "media", "tiny.mp3"));
+const WAV = readFileSync(join(__dirname, "..", "fixtures", "media", "tiny.wav"));
+
+let testApp: TestApp;
+let adminToken: string;
+
+beforeAll(async () => {
+  testApp = await buildTestApp();
+  adminToken = await loginAsAdmin(testApp.app);
+}, 30_000);
+
+afterAll(async () => {
+  await testApp.cleanup();
+}, 10_000);
+
+describe.skipIf(!ffmpegAvailable())("merge-audio (requires ffmpeg)", () => {
+  it("merges two audio files with different sample rates", async () => {
+    const { body, contentType } = createMultipartPayload([
+      { name: "file", filename: "tiny.mp3", contentType: "audio/mpeg", content: MP3 },
+      { name: "file", filename: "tiny.wav", contentType: "audio/wav", content: WAV },
+      { name: "settings", content: JSON.stringify({ format: "mp3" }) },
+    ]);
+    const res = await testApp.app.inject({
+      method: "POST",
+      url: "/api/v1/tools/merge-audio",
+      headers: { authorization: `Bearer ${adminToken}`, "content-type": contentType },
+      body,
+    });
+
+    expect(res.statusCode).toBe(200);
+    const envelope = JSON.parse(res.body);
+    expect(envelope.downloadUrl).toBeDefined();
+
+    const dl = await testApp.app.inject({ method: "GET", url: envelope.downloadUrl });
+    expect(dl.statusCode).toBe(200);
+
+    // Probe: duration should be close to 1.044 + 1.0 = 2.044s
+    const tmpDir = mkdtempSync(join(tmpdir(), "merge-audio-test-"));
+    const probeFile = join(tmpDir, "merged.mp3");
+    writeFileSync(probeFile, dl.rawPayload);
+    const info = await probeMedia(probeFile);
+    const expected = 2.04;
+    expect(info.durationS).toBeDefined();
+    expect(Math.abs((info.durationS ?? 0) - expected)).toBeLessThan(expected * 0.3);
+  }, 60_000);
+
+  it("rejects when only one file is provided", async () => {
+    const { body, contentType } = createMultipartPayload([
+      { name: "file", filename: "tiny.mp3", contentType: "audio/mpeg", content: MP3 },
+      { name: "settings", content: JSON.stringify({}) },
+    ]);
+    const res = await testApp.app.inject({
+      method: "POST",
+      url: "/api/v1/tools/merge-audio",
+      headers: { authorization: `Bearer ${adminToken}`, "content-type": contentType },
+      body,
+    });
+
+    expect(res.statusCode).toBe(422);
+    const parsed = JSON.parse(res.body);
+    expect(parsed.details).toMatch(/at least two/i);
+  }, 60_000);
+});
diff --git a/tests/integration/noise-reduction.test.ts b/tests/integration/noise-reduction.test.ts
new file mode 100644
index 00000000..0590f289
--- /dev/null
+++ b/tests/integration/noise-reduction.test.ts
@@ -0,0 +1,52 @@
+import { mkdtempSync, readFileSync, writeFileSync } from "node:fs";
+import { tmpdir } from "node:os";
+import { join } from "node:path";
+import { ffmpegAvailable, probeMedia } from "@snapotter/media-engine";
+import { afterAll, beforeAll, describe, expect, it } from "vitest";
+import { buildTestApp, createMultipartPayload, loginAsAdmin, type TestApp } from "./test-server.js";
+
+const MP3 = readFileSync(join(__dirname, "..", "fixtures", "media", "tiny.mp3"));
+
+let testApp: TestApp;
+let adminToken: string;
+
+beforeAll(async () => {
+  testApp = await buildTestApp();
+  adminToken = await loginAsAdmin(testApp.app);
+}, 30_000);
+
+afterAll(async () => {
+  await testApp.cleanup();
+}, 10_000);
+
+async function runTool(settings: Record<string, unknown>) {
+  const { body, contentType } = createMultipartPayload([
+    { name: "file", filename: "tiny.mp3", contentType: "audio/mpeg", content: MP3 },
+    { name: "settings", content: JSON.stringify(settings) },
+  ]);
+  return testApp.app.inject({
+    method: "POST",
+    url: "/api/v1/tools/noise-reduction",
+    headers: { authorization: `Bearer ${adminToken}`, "content-type": contentType },
+    body,
+  });
+}
+
+describe.skipIf(!ffmpegAvailable())("noise-reduction (requires ffmpeg)", () => {
+  it("denoises with medium strength and returns audio", async () => {
+    const res = await runTool({ strength: "medium" });
+    expect(res.statusCode).toBe(200);
+    const envelope = JSON.parse(res.body);
+    expect(envelope.downloadUrl).toBeDefined();
+
+    const dl = await testApp.app.inject({ method: "GET", url: envelope.downloadUrl });
+    expect(dl.statusCode).toBe(200);
+
+    const tmpDir = mkdtempSync(join(tmpdir(), "denoise-test-"));
+    const probeFile = join(tmpDir, "denoised.mp3");
+    writeFileSync(probeFile, dl.rawPayload);
+    const info = await probeMedia(probeFile);
+    const audio = info.streams.find((s) => s.type === "audio");
+    expect(audio).toBeDefined();
+  }, 60_000);
+});
diff --git a/tests/integration/normalize-audio.test.ts b/tests/integration/normalize-audio.test.ts
new file mode 100644
index 00000000..67701201
--- /dev/null
+++ b/tests/integration/normalize-audio.test.ts
@@ -0,0 +1,47 @@
+import { readFileSync } from "node:fs";
+import { join } from "node:path";
+import { ffmpegAvailable } from "@snapotter/media-engine";
+import { afterAll, beforeAll, describe, expect, it } from "vitest";
+import { buildTestApp, createMultipartPayload, loginAsAdmin, type TestApp } from "./test-server.js";
+
+const WAV = readFileSync(join(__dirname, "..", "fixtures", "media", "tiny.wav"));
+
+let testApp: TestApp;
+let adminToken: string;
+
+beforeAll(async () => {
+  testApp = await buildTestApp();
+  adminToken = await loginAsAdmin(testApp.app);
+}, 30_000);
+
+afterAll(async () => {
+  await testApp.cleanup();
+}, 10_000);
+
+async function runTool(settings: Record<string, unknown>) {
+  const { body, contentType } = createMultipartPayload([
+    { name: "file", filename: "tiny.wav", contentType: "audio/wav", content: WAV },
+    { name: "settings", content: JSON.stringify(settings) },
+  ]);
+  return testApp.app.inject({
+    method: "POST",
+    url: "/api/v1/tools/normalize-audio",
+    headers: { authorization: `Bearer ${adminToken}`, "content-type": contentType },
+    body,
+  });
+}
+
+describe.skipIf(!ffmpegAvailable())("normalize-audio (requires ffmpeg)", () => {
+  it("normalizes 8 kHz WAV and returns 200", async () => {
+    const res = await runTool({});
+    expect(res.statusCode).toBe(200);
+    const envelope = JSON.parse(res.body);
+    expect(envelope.downloadUrl).toBeDefined();
+    const dl = await testApp.app.inject({
+      method: "GET",
+      url: envelope.downloadUrl,
+    });
+    expect(dl.statusCode).toBe(200);
+    expect(dl.rawPayload.length).toBeGreaterThan(100);
+  }, 60_000);
+});
diff --git a/tests/integration/pitch-shift.test.ts b/tests/integration/pitch-shift.test.ts
new file mode 100644
index 00000000..04d233f1
--- /dev/null
+++ b/tests/integration/pitch-shift.test.ts
@@ -0,0 +1,59 @@
+import { mkdtempSync, readFileSync, writeFileSync } from "node:fs";
+import { tmpdir } from "node:os";
+import { join } from "node:path";
+import { ffmpegAvailable, probeMedia } from "@snapotter/media-engine";
+import { afterAll, beforeAll, describe, expect, it } from "vitest";
+import { buildTestApp, createMultipartPayload, loginAsAdmin, type TestApp } from "./test-server.js";
+
+const MP3 = readFileSync(join(__dirname, "..", "fixtures", "media", "tiny.mp3"));
+
+let testApp: TestApp;
+let adminToken: string;
+
+beforeAll(async () => {
+  testApp = await buildTestApp();
+  adminToken = await loginAsAdmin(testApp.app);
+}, 30_000);
+
+afterAll(async () => {
+  await testApp.cleanup();
+}, 10_000);
+
+async function runTool(settings: Record<string, unknown>) {
+  const { body, contentType } = createMultipartPayload([
+    { name: "file", filename: "tiny.mp3", contentType: "audio/mpeg", content: MP3 },
+    { name: "settings", content: JSON.stringify(settings) },
+  ]);
+  return testApp.app.inject({
+    method: "POST",
+    url: "/api/v1/tools/pitch-shift",
+    headers: { authorization: `Bearer ${adminToken}`, "content-type": contentType },
+    body,
+  });
+}
+
+describe.skipIf(!ffmpegAvailable())("pitch-shift (requires ffmpeg)", () => {
+  it("shifts +12 semitones with duration roughly unchanged", async () => {
+    const res = await runTool({ semitones: 12 });
+    expect(res.statusCode).toBe(200);
+    const envelope = JSON.parse(res.body);
+    expect(envelope.downloadUrl).toBeDefined();
+
+    const dl = await testApp.app.inject({ method: "GET", url: envelope.downloadUrl });
+    expect(dl.statusCode).toBe(200);
+
+    const tmpDir = mkdtempSync(join(tmpdir(), "pitch-test-"));
+    const probeFile = join(tmpDir, "pitched.mp3");
+    writeFileSync(probeFile, dl.rawPayload);
+    const info = await probeMedia(probeFile);
+
+    // rubberband preserves tempo; duration should be roughly 1.044s (30% tolerance)
+    expect(info.durationS).toBeGreaterThan(1.044 * 0.7);
+    expect(info.durationS).toBeLessThan(1.044 * 1.3);
+  }, 60_000);
+
+  it("rejects semitones 0", async () => {
+    const res = await runTool({ semitones: 0 });
+    expect(res.statusCode).toBe(400);
+  });
+});
diff --git a/tests/integration/reverse-audio.test.ts b/tests/integration/reverse-audio.test.ts
new file mode 100644
index 00000000..a564afce
--- /dev/null
+++ b/tests/integration/reverse-audio.test.ts
@@ -0,0 +1,64 @@
+import { mkdtempSync, readFileSync, writeFileSync } from "node:fs";
+import { tmpdir } from "node:os";
+import { join } from "node:path";
+import { ffmpegAvailable, probeMedia } from "@snapotter/media-engine";
+import { afterAll, beforeAll, describe, expect, it } from "vitest";
+import { buildTestApp, createMultipartPayload, loginAsAdmin, type TestApp } from "./test-server.js";
+
+const MP3 = readFileSync(join(__dirname, "..", "fixtures", "media", "tiny.mp3"));
+
+let testApp: TestApp;
+let adminToken: string;
+
+beforeAll(async () => {
+  testApp = await buildTestApp();
+  adminToken = await loginAsAdmin(testApp.app);
+}, 30_000);
+
+afterAll(async () => {
+  await testApp.cleanup();
+}, 10_000);
+
+async function runTool(settings: Record<string, unknown>) {
+  const { body, contentType } = createMultipartPayload([
+    { name: "file", filename: "tiny.mp3", contentType: "audio/mpeg", content: MP3 },
+    { name: "settings", content: JSON.stringify(settings) },
+  ]);
+  return testApp.app.inject({
+    method: "POST",
+    url: "/api/v1/tools/reverse-audio",
+    headers: { authorization: `Bearer ${adminToken}`, "content-type": contentType },
+    body,
+  });
+}
+
+describe.skipIf(!ffmpegAvailable())("reverse-audio (requires ffmpeg)", () => {
+  it("reverses audio and returns 200 with duration roughly matching source", async () => {
+    // Probe source duration
+    const srcTmpDir = mkdtempSync(join(tmpdir(), "rev-src-"));
+    const srcFile = join(srcTmpDir, "tiny.mp3");
+    writeFileSync(srcFile, MP3);
+    const srcInfo = await probeMedia(srcFile);
+
+    const res = await runTool({});
+    expect(res.statusCode).toBe(200);
+    const envelope = JSON.parse(res.body);
+    expect(envelope.downloadUrl).toBeDefined();
+    const dl = await testApp.app.inject({
+      method: "GET",
+      url: envelope.downloadUrl,
+    });
+    expect(dl.statusCode).toBe(200);
+    expect(dl.rawPayload.length).toBeGreaterThan(100);
+
+    const tmpDir = mkdtempSync(join(tmpdir(), "rev-test-"));
+    const probeFile = join(tmpDir, "reversed.mp3");
+    writeFileSync(probeFile, dl.rawPayload);
+    const info = await probeMedia(probeFile);
+    expect(info.durationS).not.toBeNull();
+    // Duration should be roughly the same (30% tolerance)
+    const srcDur = srcInfo.durationS ?? 1;
+    expect(info.durationS as number).toBeGreaterThan(srcDur * 0.7);
+    expect(info.durationS as number).toBeLessThan(srcDur * 1.3);
+  }, 60_000);
+});
diff --git a/tests/integration/ringtone-maker.test.ts b/tests/integration/ringtone-maker.test.ts
new file mode 100644
index 00000000..5aa30bc8
--- /dev/null
+++ b/tests/integration/ringtone-maker.test.ts
@@ -0,0 +1,51 @@
+import { readFileSync } from "node:fs";
+import { join } from "node:path";
+import { ffmpegAvailable } from "@snapotter/media-engine";
+import { afterAll, beforeAll, describe, expect, it } from "vitest";
+import { buildTestApp, createMultipartPayload, loginAsAdmin, type TestApp } from "./test-server.js";
+
+const MP3 = readFileSync(join(__dirname, "..", "fixtures", "media", "tiny.mp3"));
+
+let testApp: TestApp;
+let adminToken: string;
+
+beforeAll(async () => {
+  testApp = await buildTestApp();
+  adminToken = await loginAsAdmin(testApp.app);
+}, 30_000);
+
+afterAll(async () => {
+  await testApp.cleanup();
+}, 10_000);
+
+async function runTool(settings: Record<string, unknown>) {
+  const { body, contentType } = createMultipartPayload([
+    { name: "file", filename: "tiny.mp3", contentType: "audio/mpeg", content: MP3 },
+    { name: "settings", content: JSON.stringify(settings) },
+  ]);
+  return testApp.app.inject({
+    method: "POST",
+    url: "/api/v1/tools/ringtone-maker",
+    headers: { authorization: `Bearer ${adminToken}`, "content-type": contentType },
+    body,
+  });
+}
+
+describe.skipIf(!ffmpegAvailable())("ringtone-maker (requires ffmpeg)", () => {
+  it("creates m4r ringtone with defaults and returns 200", async () => {
+    const res = await runTool({});
+    expect(res.statusCode).toBe(200);
+    const envelope = JSON.parse(res.body);
+    expect(envelope.downloadUrl).toBeDefined();
+
+    const dl = await testApp.app.inject({ method: "GET", url: envelope.downloadUrl });
+    expect(dl.statusCode).toBe(200);
+    expect(dl.rawPayload.length).toBeGreaterThan(200);
+  }, 60_000);
+
+  it("rejects startS beyond audio duration (422)", async () => {
+    const res = await runTool({ startS: 5 });
+    expect(res.statusCode).toBe(422);
+    expect(res.body).toMatch(/beyond the end/i);
+  }, 60_000);
+});
diff --git a/tests/integration/silence-removal.test.ts b/tests/integration/silence-removal.test.ts
new file mode 100644
index 00000000..b4481515
--- /dev/null
+++ b/tests/integration/silence-removal.test.ts
@@ -0,0 +1,54 @@
+import { mkdtempSync, readFileSync, writeFileSync } from "node:fs";
+import { tmpdir } from "node:os";
+import { join } from "node:path";
+import { ffmpegAvailable, probeMedia } from "@snapotter/media-engine";
+import { afterAll, beforeAll, describe, expect, it } from "vitest";
+import { buildTestApp, createMultipartPayload, loginAsAdmin, type TestApp } from "./test-server.js";
+
+const TONE_GAP = readFileSync(join(__dirname, "..", "fixtures", "media", "tone-gap.wav"));
+
+let testApp: TestApp;
+let adminToken: string;
+
+beforeAll(async () => {
+  testApp = await buildTestApp();
+  adminToken = await loginAsAdmin(testApp.app);
+}, 30_000);
+
+afterAll(async () => {
+  await testApp.cleanup();
+}, 10_000);
+
+async function runTool(settings: Record<string, unknown>) {
+  const { body, contentType } = createMultipartPayload([
+    { name: "file", filename: "tone-gap.wav", contentType: "audio/wav", content: TONE_GAP },
+    { name: "settings", content: JSON.stringify(settings) },
+  ]);
+  return testApp.app.inject({
+    method: "POST",
+    url: "/api/v1/tools/silence-removal",
+    headers: { authorization: `Bearer ${adminToken}`, "content-type": contentType },
+    body,
+  });
+}
+
+describe.skipIf(!ffmpegAvailable())("silence-removal (requires ffmpeg)", () => {
+  it("removes silent gap and shortens duration below 1.05s", async () => {
+    const res = await runTool({ thresholdDb: -40, minSilenceS: 0.2 });
+    expect(res.statusCode).toBe(200);
+    const envelope = JSON.parse(res.body);
+    expect(envelope.downloadUrl).toBeDefined();
+
+    const dl = await testApp.app.inject({ method: "GET", url: envelope.downloadUrl });
+    expect(dl.statusCode).toBe(200);
+
+    const tmpDir = mkdtempSync(join(tmpdir(), "silence-test-"));
+    const probeFile = join(tmpDir, "nosilence.wav");
+    writeFileSync(probeFile, dl.rawPayload);
+    const info = await probeMedia(probeFile);
+
+    // tone-gap.wav is ~1.2s with a 0.4s silent middle; output should be shorter than 1.05s
+    expect(info.durationS).toBeLessThan(1.05);
+    expect(info.durationS).toBeGreaterThan(0.3);
+  }, 60_000);
+});
diff --git a/tests/integration/split-audio.test.ts b/tests/integration/split-audio.test.ts
new file mode 100644
index 00000000..ec37d5c1
--- /dev/null
+++ b/tests/integration/split-audio.test.ts
@@ -0,0 +1,126 @@
+import { readFileSync } from "node:fs";
+import { join } from "node:path";
+import { ffmpegAvailable } from "@snapotter/media-engine";
+import { afterAll, beforeAll, describe, expect, it } from "vitest";
+import { buildTestApp, createMultipartPayload, loginAsAdmin, type TestApp } from "./test-server.js";
+
+const MP3 = readFileSync(join(__dirname, "..", "fixtures", "media", "tiny.mp3"));
+const TONE_GAP = readFileSync(join(__dirname, "..", "fixtures", "media", "tone-gap.wav"));
+
+let testApp: TestApp;
+let adminToken: string;
+
+beforeAll(async () => {
+  testApp = await buildTestApp();
+  adminToken = await loginAsAdmin(testApp.app);
+}, 30_000);
+
+afterAll(async () => {
+  await testApp.cleanup();
+}, 10_000);
+
+describe.skipIf(!ffmpegAvailable())("split-audio (requires ffmpeg)", () => {
+  it("splits into 2 parts via parts mode", async () => {
+    const { body, contentType } = createMultipartPayload([
+      { name: "file", filename: "tiny.mp3", contentType: "audio/mpeg", content: MP3 },
+      { name: "settings", content: JSON.stringify({ mode: "parts", parts: 2 }) },
+    ]);
+    const res = await testApp.app.inject({
+      method: "POST",
+      url: "/api/v1/tools/split-audio",
+      headers: { authorization: `Bearer ${adminToken}`, "content-type": contentType },
+      body,
+    });
+
+    expect(res.statusCode).toBe(200);
+    const envelope = JSON.parse(res.body);
+    expect(envelope.downloadUrl).toBeDefined();
+
+    const dl = await testApp.app.inject({ method: "GET", url: envelope.downloadUrl });
+    expect(dl.statusCode).toBe(200);
+    // ZIP magic: PK\x03\x04
+    expect(dl.rawPayload[0]).toBe(0x50);
+    expect(dl.rawPayload[1]).toBe(0x4b);
+  }, 60_000);
+
+  it("splits by silence on tone-gap.wav", async () => {
+    const { body, contentType } = createMultipartPayload([
+      { name: "file", filename: "tone-gap.wav", contentType: "audio/wav", content: TONE_GAP },
+      {
+        name: "settings",
+        content: JSON.stringify({ mode: "silence", thresholdDb: -40, minSilenceS: 0.2 }),
+      },
+    ]);
+    const res = await testApp.app.inject({
+      method: "POST",
+      url: "/api/v1/tools/split-audio",
+      headers: { authorization: `Bearer ${adminToken}`, "content-type": contentType },
+      body,
+    });
+
+    expect(res.statusCode).toBe(200);
+    const envelope = JSON.parse(res.body);
+    const dl = await testApp.app.inject({ method: "GET", url: envelope.downloadUrl });
+    expect(dl.statusCode).toBe(200);
+    // ZIP magic
+    expect(dl.rawPayload[0]).toBe(0x50);
+    expect(dl.rawPayload[1]).toBe(0x4b);
+    expect(dl.rawPayload.length).toBeGreaterThan(400);
+  }, 60_000);
+
+  it("rejects silence mode when no silence found", async () => {
+    const { body, contentType } = createMultipartPayload([
+      { name: "file", filename: "tiny.mp3", contentType: "audio/mpeg", content: MP3 },
+      {
+        name: "settings",
+        content: JSON.stringify({ mode: "silence", thresholdDb: -40, minSilenceS: 0.2 }),
+      },
+    ]);
+    const res = await testApp.app.inject({
+      method: "POST",
+      url: "/api/v1/tools/split-audio",
+      headers: { authorization: `Bearer ${adminToken}`, "content-type": contentType },
+      body,
+    });
+
+    expect(res.statusCode).toBe(422);
+    const parsed = JSON.parse(res.body);
+    expect(parsed.details).toMatch(/no silence found/i);
+  }, 60_000);
+
+  it("splits by time mode on tone-gap.wav (segmentS=1)", async () => {
+    const { body, contentType } = createMultipartPayload([
+      { name: "file", filename: "tone-gap.wav", contentType: "audio/wav", content: TONE_GAP },
+      { name: "settings", content: JSON.stringify({ mode: "time", segmentS: 1 }) },
+    ]);
+    const res = await testApp.app.inject({
+      method: "POST",
+      url: "/api/v1/tools/split-audio",
+      headers: { authorization: `Bearer ${adminToken}`, "content-type": contentType },
+      body,
+    });
+
+    expect(res.statusCode).toBe(200);
+    const envelope = JSON.parse(res.body);
+    const dl = await testApp.app.inject({ method: "GET", url: envelope.downloadUrl });
+    expect(dl.statusCode).toBe(200);
+    // ZIP magic
+    expect(dl.rawPayload[0]).toBe(0x50);
+    expect(dl.rawPayload[1]).toBe(0x4b);
+  }, 60_000);
+
+  it("rejects parts=1 (schema minimum is 2)", async () => {
+    const { body, contentType } = createMultipartPayload([
+      { name: "file", filename: "tiny.mp3", contentType: "audio/mpeg", content: MP3 },
+      { name: "settings", content: JSON.stringify({ mode: "parts", parts: 1 }) },
+    ]);
+    const res = await testApp.app.inject({
+      method: "POST",
+      url: "/api/v1/tools/split-audio",
+      headers: { authorization: `Bearer ${adminToken}`, "content-type": contentType },
+      body,
+    });
+
+    expect(res.statusCode).toBe(400);
+  }, 60_000);
+});
diff --git a/tests/integration/volume-adjust.test.ts b/tests/integration/volume-adjust.test.ts
new file mode 100644
index 00000000..742e3a2c
--- /dev/null
+++ b/tests/integration/volume-adjust.test.ts
@@ -0,0 +1,60 @@
+import { mkdtempSync, readFileSync, writeFileSync } from "node:fs";
+import { tmpdir } from "node:os";
+import { join } from "node:path";
+import { ffmpegAvailable, probeMedia } from "@snapotter/media-engine";
+import { afterAll, beforeAll, describe, expect, it } from "vitest";
+import { buildTestApp, createMultipartPayload, loginAsAdmin, type TestApp } from "./test-server.js";
+
+const MP3 = readFileSync(join(__dirname, "..", "fixtures", "media", "tiny.mp3"));
+
+let testApp: TestApp;
+let adminToken: string;
+
+beforeAll(async () => {
+  testApp = await buildTestApp();
+  adminToken = await loginAsAdmin(testApp.app);
+}, 30_000);
+
+afterAll(async () => {
+  await testApp.cleanup();
+}, 10_000);
+
+async function runTool(settings: Record<string, unknown>) {
+  const { body, contentType } = createMultipartPayload([
+    { name: "file", filename: "tiny.mp3", contentType: "audio/mpeg", content: MP3 },
+    { name: "settings", content: JSON.stringify(settings) },
+  ]);
+  return testApp.app.inject({
+    method: "POST",
+    url: "/api/v1/tools/volume-adjust",
+    headers: { authorization: `Bearer ${adminToken}`, "content-type": contentType },
+    body,
+  });
+}
+
+describe.skipIf(!ffmpegAvailable())("volume-adjust (requires ffmpeg)", () => {
+  it("adjusts volume and returns 200 with audio stream", async () => {
+    const res = await runTool({ gainDb: 3 });
+    expect(res.statusCode).toBe(200);
+    const envelope = JSON.parse(res.body);
+    expect(envelope.downloadUrl).toBeDefined();
+    const dl = await testApp.app.inject({
+      method: "GET",
+      url: envelope.downloadUrl,
+    });
+    expect(dl.statusCode).toBe(200);
+    expect(dl.rawPayload.length).toBeGreaterThan(100);
+
+    const tmpDir = mkdtempSync(join(tmpdir(), "vol-test-"));
+    const probeFile = join(tmpDir, "adjusted.mp3");
+    writeFileSync(probeFile, dl.rawPayload);
+    const info = await probeMedia(probeFile);
+    const audio = info.streams.find((s) => s.type === "audio");
+    expect(audio).toBeDefined();
+  }, 60_000);
+
+  it("rejects gainDb out of range (50)", async () => {
+    const res = await runTool({ gainDb: 50 });
+    expect(res.statusCode).toBe(400);
+  });
+});
diff --git a/tests/integration/waveform-image.test.ts b/tests/integration/waveform-image.test.ts
new file mode 100644
index 00000000..0ac22599
--- /dev/null
+++ b/tests/integration/waveform-image.test.ts
@@ -0,0 +1,55 @@
+import { readFileSync } from "node:fs";
+import { join } from "node:path";
+import { ffmpegAvailable } from "@snapotter/media-engine";
+import { afterAll, beforeAll, describe, expect, it } from "vitest";
+import { buildTestApp, createMultipartPayload, loginAsAdmin, type TestApp } from "./test-server.js";
+
+const MP3 = readFileSync(join(__dirname, "..", "fixtures", "media", "tiny.mp3"));
+
+let testApp: TestApp;
+let adminToken: string;
+
+beforeAll(async () => {
+  testApp = await buildTestApp();
+  adminToken = await loginAsAdmin(testApp.app);
+}, 30_000);
+
+afterAll(async () => {
+  await testApp.cleanup();
+}, 10_000);
+
+async function runTool(settings: Record<string, unknown>) {
+  const { body, contentType } = createMultipartPayload([
+    { name: "file", filename: "tiny.mp3", contentType: "audio/mpeg", content: MP3 },
+    { name: "settings", content: JSON.stringify(settings) },
+  ]);
+  return testApp.app.inject({
+    method: "POST",
+    url: "/api/v1/tools/waveform-image",
+    headers: { authorization: `Bearer ${adminToken}`, "content-type": contentType },
+    body,
+  });
+}
+
+describe.skipIf(!ffmpegAvailable())("waveform-image (requires ffmpeg)", () => {
+  it("generates PNG waveform with default settings", async () => {
+    const res = await runTool({});
+    expect(res.statusCode).toBe(200);
+    const envelope = JSON.parse(res.body);
+    expect(envelope.downloadUrl).toBeDefined();
+
+    const dl = await testApp.app.inject({ method: "GET", url: envelope.downloadUrl });
+    expect(dl.statusCode).toBe(200);
+
+    // PNG magic bytes: 89 50 4E 47
+    expect(dl.rawPayload[0]).toBe(0x89);
+    expect(dl.rawPayload[1]).toBe(0x50);
+    expect(dl.rawPayload[2]).toBe(0x4e);
+    expect(dl.rawPayload[3]).toBe(0x47);
+  }, 60_000);
+
+  it("rejects invalid color string (400)", async () => {
+    const res = await runTool({ color: "blue" });
+    expect(res.statusCode).toBe(400);
+  });
+});
diff --git a/tests/unit/api/audio-output.test.ts b/tests/unit/api/audio-output.test.ts
new file mode 100644
index 00000000..598345eb
--- /dev/null
+++ b/tests/unit/api/audio-output.test.ts
@@ -0,0 +1,24 @@
+import { describe, expect, it } from "vitest";
+import { audioOutputFor } from "../../../apps/api/src/lib/media-tool.js";
+
+describe("audioOutputFor", () => {
+  it("normalises uppercase extensions", () => {
+    const out = audioOutputFor(".MP3");
+    expect(out.ext).toBe(".mp3");
+    expect(out.contentType).toBe("audio/mpeg");
+    expect(out.encodeArgs).toContain("libmp3lame");
+  });
+
+  it("falls back to mp3 for decode-only formats", () => {
+    const out = audioOutputFor(".wma");
+    expect(out.ext).toBe(".mp3");
+    expect(out.contentType).toBe("audio/mpeg");
+  });
+
+  it("maps .aac input to .m4a output", () => {
+    const out = audioOutputFor(".aac");
+    expect(out.ext).toBe(".m4a");
+    expect(out.contentType).toBe("audio/mp4");
+    expect(out.encodeArgs).toContain("aac");
+  });
+});
diff --git a/tests/unit/api/tool-factory-route.test.ts b/tests/unit/api/tool-factory-route.test.ts
index b7834f15..3ba41da0 100644
--- a/tests/unit/api/tool-factory-route.test.ts
+++ b/tests/unit/api/tool-factory-route.test.ts
@@ -136,7 +136,7 @@ vi.mock("sharp", () => ({
 
 // ── Imports ─────────────────────────────────────────────────────────────
 
-import { waitForJob } from "../../../apps/api/src/jobs/enqueue.js";
+import { enqueueToolJob, waitForJob } from "../../../apps/api/src/jobs/enqueue.js";
 import { isToolInstalled } from "../../../apps/api/src/lib/feature-status.js";
 import { validateImageBuffer } from "../../../apps/api/src/lib/file-validation.js";
 import type { AnyToolRouteConfig } from "../../../apps/api/src/routes/tool-factory.js";
@@ -575,4 +575,149 @@ describe("createToolRoute", () => {
       );
     });
   });
+
+  describe("multipart field recovery", () => {
+    it("recovers settings from part.fields when the iterator drops trailing fields", async () => {
+      const app = createMockApp();
+      const id = uniqueId();
+      createToolRoute(app as never, makeMockConfig(id));
+      const handler = app.routes[`/api/v1/tools/${id}`];
+      const reply = createMockReply();
+
+      // Simulate the @fastify/multipart race: the iterator yields only the
+      // file part; the settings field is present only on part.fields.
+      const req = {
+        parts: () => ({
+          [Symbol.asyncIterator]: async function* () {
+            yield {
+              type: "file",
+              filename: "test.png",
+              file: (async function* () {
+                yield Buffer.from("png-data");
+              })(),
+              fields: {
+                settings: { value: '{"x":1}' },
+              },
+            };
+          },
+        }),
+        log: { warn: vi.fn(), error: vi.fn(), info: vi.fn() },
+      };
+
+      await handler(req, reply);
+
+      // Settings must be recovered as {x:1}, not fall through to defaults ({})
+      const enqueueCall = vi.mocked(enqueueToolJob).mock.calls[0][0];
+      expect(enqueueCall.settings).toEqual({ x: 1 });
+      expect(reply.send).toHaveBeenCalledWith(
+        expect.objectContaining({ jobId: expect.any(String) }),
+      );
+    });
+
+    it("does not overwrite settings already collected from the iterator", async () => {
+      const app = createMockApp();
+      const id = uniqueId();
+      createToolRoute(app as never, makeMockConfig(id));
+      const handler = app.routes[`/api/v1/tools/${id}`];
+      const reply = createMockReply();
+
+      // Both the iterator and part.fields carry settings; the iterator value wins
+      const req = {
+        parts: () => ({
+          [Symbol.asyncIterator]: async function* () {
+            yield {
+              type: "file",
+              filename: "test.png",
+              file: (async function* () {
+                yield Buffer.from("png-data");
+              })(),
+              fields: {
+                settings: { value: '{"from":"fields"}' },
+              },
+            };
+            yield {
+              type: "field",
+              fieldname: "settings",
+              value: '{"from":"iterator"}',
+              file: (async function* () {})(),
+              fields: {
+                settings: { value: '{"from":"fields"}' },
+              },
+            };
+          },
+        }),
+        log: { warn: vi.fn(), error: vi.fn(), info: vi.fn() },
+      };
+
+      await handler(req, reply);
+
+      const enqueueCall = vi.mocked(enqueueToolJob).mock.calls[0][0];
+      expect(enqueueCall.settings).toEqual({ from: "iterator" });
+    });
+
+    it("recovers fileId and clientJobId from part.fields", async () => {
+      const app = createMockApp();
+      const id = uniqueId();
+      createToolRoute(app as never, makeMockConfig(id));
+      const handler = app.routes[`/api/v1/tools/${id}`];
+      const reply = createMockReply();
+
+      const req = {
+        parts: () => ({
+          [Symbol.asyncIterator]: async function* () {
+            yield {
+              type: "file",
+              filename: "test.png",
+              file: (async function* () {
+                yield Buffer.from("png-data");
+              })(),
+              fields: {
+                settings: { value: "{}" },
+                fileId: { value: "f-123" },
+                clientJobId: { value: "cj-456" },
+              },
+            };
+          },
+        }),
+        log: { warn: vi.fn(), error: vi.fn(), info: vi.fn() },
+      };
+
+      await handler(req, reply);
+
+      const enqueueCall = vi.mocked(enqueueToolJob).mock.calls[0][0];
+      expect(enqueueCall.fileId).toBe("f-123");
+      expect(enqueueCall.clientJobId).toBe("cj-456");
+    });
+
+    it("handles array-form fields from part.fields", async () => {
+      const app = createMockApp();
+      const id = uniqueId();
+      createToolRoute(app as never, makeMockConfig(id));
+      const handler = app.routes[`/api/v1/tools/${id}`];
+      const reply = createMockReply();
+
+      const req = {
+        parts: () => ({
+          [Symbol.asyncIterator]: async function* () {
+            yield {
+              type: "file",
+              filename: "test.png",
+              file: (async function* () {
+                yield Buffer.from("png-data");
+              })(),
+              fields: {
+                settings: [{ value: '{"arr":true}' }],
+              },
+            };
+          },
+        }),
+        log: { warn: vi.fn(), error: vi.fn(), info: vi.fn() },
+      };
+
+      await handler(req, reply);
+
+      const enqueueCall = vi.mocked(enqueueToolJob).mock.calls[0][0];
+      expect(enqueueCall.settings).toEqual({ arr: true });
+    });
+  });
 });
diff --git a/tests/unit/api/video-speed.test.ts b/tests/unit/api/video-speed.test.ts
index 282bd7b2..3915a1f3 100644
--- a/tests/unit/api/video-speed.test.ts
+++ b/tests/unit/api/video-speed.test.ts
@@ -1,5 +1,5 @@
 import { describe, expect, it } from "vitest";
-import { buildAtempoChain } from "../../../apps/api/src/routes/tools/video-speed.js";
+import { buildAtempoChain } from "../../../apps/api/src/lib/media-tool.js";
 
 describe("buildAtempoChain", () => {
   it("returns a single atempo for factor >= 0.5", () => {