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audio-mix

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音频混合 / 混音：把旁白口播 + 背景音乐 + 音效混成一轨，BGM 自动循环补足并可闪避（旁白说话时自动压低 BGM 保证人声清晰）。当用户说 混音、音频混合、旁白加背景音乐、配音加BGM、人声和音乐混一起、加音效、音频叠加、BGM 压低、闪避、ducking、把配音和bgm合起来 时使用。基于 shared/scripts/audio_mix.py。与 audio-editing concat 区别：concat 是前后顺序拼接，本 SKILL 是同时叠加混音；与 video-editing bgm 区别：那个给视频配乐，本 SKILL 输出纯音频。

skills/builtin/audio-mix/SKILL.md

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Nov 9, 2026
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Apache-2.0

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# 音频混合（旁白 + BGM + 音效）

> 把多条音频**同时叠加**混成一轨，核心能力是**闪避（ducking）**——旁白说话时自动压低
> 背景音乐，人声清晰、音乐不抢。全部走 `skills/shared/scripts/audio_mix.py`，
> **不要手拼 amix/sidechaincompress**。

> 前后顺序拼接（一段接一段）见 **audio-editing** `concat`；给视频配乐见 **video-editing** `bgm`；
> 降噪见 **audio-denoise**。

## 输入

| 字段 | 必填 | 说明 |
|------|------|------|
| 旁白 | 否 | 口播/配音主轨（给了则输出时长跟它走，并触发闪避） |
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