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SKILL verified Apache-2.0 Self-run

Audio Mix

skill-zju-real-easel-audio-mix · by ZJU-REAL

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。

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Install

$ agentstack add skill-zju-real-easel-audio-mix

✓ scanned · ✓ verified, works with Claude Code, Cursor, and more.

Security review

✓ Passed

No issues found. Passed automated security review. · v0.1.0 How review works →

  • Prompt-injection patterns
  • Secret / credential exfiltration
  • Dangerous shell & filesystem operations
  • Untrusted network calls
  • Known-malicious package signatures

What it can access

  • Network access No
  • Filesystem access No
  • Shell / process execution No
  • Environment & secrets No
  • Dynamic code execution No

From automated source analysis of v0.1.0. “Used” means the capability is present in the source — more access means more to trust, not that it’s unsafe.

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Reliability & compatibility

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Declared compatibility

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About

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) | | BGM | 否 | 背景音乐(自动循环补足到旁白长度) | | 音效 | 否 | 一个或多个音效,可指定各自出现时间点 |

(三者至少给一个。最典型:"旁白 + BGM"。)

输出(outputs/主题名/

  • 混音后的单轨音频(mp3/wav/m4a,按输出后缀)
  • 报告:轨数、时长、是否闪避

执行步骤

脚本路径(相对项目根):skills/shared/scripts/audio_mix.pymix -h 看参数)。

# 旁白 + BGM(默认自动闪避,BGM 循环补足到旁白长度)
python skills/shared/scripts/audio_mix.py mix \
  --voice narration.mp3 --bgm music.mp3 --bgm-volume 0.25 \
  -o outputs/主题名/final.mp3

# 关闭闪避(纯叠加)
python skills/shared/scripts/audio_mix.py mix --voice v.mp3 --bgm m.mp3 --no-duck -o out.mp3

# 旁白 + 定时音效(第 3.5s 一个叮,第 8s 一个 whoosh)
python skills/shared/scripts/audio_mix.py mix --voice v.mp3 \
  --sfx ding.wav --sfx-at 3.5 --sfx whoosh.wav --sfx-at 8 -o out.mp3

调参

  • 人声被音乐盖住:调低 --bgm-volume(默认 0.25)或确认闪避已开(默认开)。
  • 闪避太猛/音乐一顿一顿--no-duck 后手动压低 --bgm-volume
  • BGM 比旁白短:默认自动循环;不想循环用 --bgm-loop-off
  • 音效太响/太轻--sfx-volume(默认 0.9)。

规则

  1. 有旁白时输出时长 = 旁白长度,BGM 自动循环/裁切对齐并在末尾淡出。
  2. 旁白 + BGM 默认开启闪避(人声优先);不需要时显式 --no-duck
  3. --sfx--sfx-at 数量一致(或不给 --sfx-at 全部默认 0s)。
  4. 混音不做响度归一(保留相对音量);需统一响度先用 audio-editing normalize
  5. 产物统一进 outputs/主题名/

参考来源

闪避用 ffmpeg sidechaincompress(以人声为控制信号压缩 BGM),是播客/口播视频保证人声清晰的 标准做法;多轨叠加用 amix。把 sidechain 接线与循环对齐封装成确定性脚本。

Source & license

This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.

Install and usage instructions live in the source repository linked above.

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Versions

  • v0.1.0 Imported from the upstream source.