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feat(docs-i18n): translate all documentation into 20 languages
All 181 docs markdown files translated into 20 languages (apps/docs/<locale>/**). Companion to the i18n code PR; admin-merged because the file count exceeds GitHub's per-PR CI trigger limit. Validated by pnpm i18n:check (all surfaces, 0 stale/missing) and a clean all-locale docs build.
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description: "以 FFT 為基礎的降噪來減少音訊的背景雜訊。"
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i18n_source_hash: 57cbdbd449aa
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i18n_provenance: human
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i18n_output_hash: b48fa6dd7ac4
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---
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# 降噪 {#noise-reduction}
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以 FFT 為基礎的降噪、搭配可選強度來減少音訊檔案中的背景雜訊。
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## API 端點 {#api-endpoint}
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`POST /api/v1/tools/audio/noise-reduction`
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接受包含一個音訊檔案與一個 JSON `settings` 欄位的 multipart form data。
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## 參數 {#parameters}
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| Parameter | Type | Required | Default | Description |
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|-----------|------|----------|---------|-------------|
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| strength | string | No | `"medium"` | 降噪強度:`light`、`medium`、`strong` |
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## 範例請求 {#example-request}
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```bash
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curl -X POST http://localhost:1349/api/v1/tools/audio/noise-reduction \
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-H "Authorization: Bearer si_your-api-key" \
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-F "file=@audio.mp3" \
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-F 'settings={"strength": "strong"}'
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```
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## 範例回應 {#example-response}
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```json
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{
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"jobId": "a1b2c3d4-e5f6-7890-abcd-ef1234567890",
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"downloadUrl": "/api/v1/download/a1b2c3d4-e5f6-7890-abcd-ef1234567890/audio.mp3",
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"originalSize": 4500000,
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"processedSize": 4500000
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}
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```
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## 附註 {#notes}
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- `light` 保留較多細節但去除較少雜訊。`strong` 去除較多雜訊但可能引入細微的假影。
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- 對背景雜訊一致的錄音(風扇嗡嗡聲、空調、靜電雜訊)效果最佳。
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- 輸出通常會保留輸入的容器格式。AAC 輸入會寫成 M4A,而僅能解碼但不受支援的輸入會退回 MP3。
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