Demucs 人声分离命令行工具,支持伴奏导出与轻量音质增强
Project description
novacal
中文 | English
novacal 是一个基于 demucs 的命令行人声分离工具。
- 输入一首歌
- 导出伴奏
no_vocals - 支持
wav / mp3 / m4a - 支持一键轻量音质增强
- 支持实时进度输出
中文
功能
- 人声分离:调用 demucs 提取
no_vocals - 音质增强:可选
--enhance - 质量预设:
fast / balanced / best - 设备选择:
cpu / mps / cuda / auto - 实时日志:避免终端看起来卡住
安装
1. 安装系统依赖
macOS:
brew install ffmpeg
brew install libsndfile
2. 安装 novacal
pip install novacal
如果你是本地源码开发:
pip install -e .
快速开始
最简单用法:
novacal "song.mp3"
开启音质增强:
novacal "song.mp3" --enhance
更高质量:
novacal "song.mp3" --quality best --enhance
导出 mp3:
novacal "song.mp3" -o "song_no_vocals.mp3" --enhance
如果命令不可用,也可以这样运行:
python -m novacal "song.mp3" --enhance
常用参数
--quality fast|balanced|best:质量预设--shifts N:手动指定 demucs shifts--device cpu|mps|cuda|auto:计算设备--float32:更稳但可能更慢--enhance:导出时做轻量后处理--debug:打印完整错误堆栈
输出格式
支持以下输出后缀:
.wav.mp3.m4a
默认输出命名:
原文件名_no_vocals.wav
不支持
.ncm
.ncm 是加密格式,不是标准音频容器,demucs 和 ffmpeg 无法直接处理。
常见问题
1. 提示缺少 ffmpeg
请先安装:
brew install ffmpeg
2. 提示 torchaudio 没有可用 backend
请安装:
brew install libsndfile
pip install -U soundfile
3. 运行很慢
- 第一次运行可能需要初始化模型
best会更慢,但通常更干净- Apple Silicon 可尝试
--device mps
发布
构建:
python -m build
上传:
python -m twine upload dist/*
English
novacal is a command-line vocal separation tool powered by demucs.
- Input a song
- Export the accompaniment as
no_vocals - Support
wav / mp3 / m4a - Optional one-click enhancement
- Real-time progress output
Features
- Vocal separation with demucs
- Optional enhancement via
--enhance - Quality presets:
fast / balanced / best - Device selection:
cpu / mps / cuda / auto - Streaming logs for better CLI feedback
Installation
1. Install system dependencies
macOS:
brew install ffmpeg
brew install libsndfile
2. Install novacal
pip install novacal
For local development:
pip install -e .
Quick Start
Basic usage:
novacal "song.mp3"
Enable enhancement:
novacal "song.mp3" --enhance
Use better quality:
novacal "song.mp3" --quality best --enhance
Export mp3:
novacal "song.mp3" -o "song_no_vocals.mp3" --enhance
If the shell command is not available, use:
python -m novacal "song.mp3" --enhance
Common Options
--quality fast|balanced|best--shifts N--device cpu|mps|cuda|auto--float32--enhance--debug
Supported Output Formats
.wav.mp3.m4a
Default output:
original_name_no_vocals.wav
Unsupported
.ncm
.ncm is an encrypted format, not a standard audio container, so it cannot be processed directly by demucs or ffmpeg.
Build and Publish
Build:
python -m build
Upload:
python -m twine upload dist/*
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