StemDeck, a free, open-source and local AI stem separator
StemDeck: A free, open-source and local AI stem separator
StemDeck：一款免费、开源且本地运行的 AI 音轨分离工具
Free, local stem separation. No account. No upload. No subscription. JOIN THE COMMUNITY Drop in an MP3, WAV, FLAC, OGG/Opus, MP4, or M4A file, or paste a YouTube URL, and StemDeck splits the audio into up to six stems (vocals, drums, bass, guitar, piano, other). Play them back in a DAW-style multitrack mixer: mute, solo, balance levels, zoom the waveform, loop a region, and export individual stems or a custom mix. Everything runs locally on your own machine. 免费、本地化的音轨分离。无需账户、无需上传、无需订阅。加入社区。只需放入 MP3、WAV、FLAC、OGG/Opus、MP4 或 M4A 文件，或者粘贴 YouTube 链接，StemDeck 就能将音频拆分为最多六个音轨（人声、鼓、贝斯、吉他、钢琴、其他）。你可以在类似 DAW（数字音频工作站）的多轨混音器中进行播放：静音、独奏、平衡音量、缩放波形、循环播放区域，并导出单个音轨或自定义混音。所有处理都在你自己的机器上本地运行。
What is this? StemDeck is a stem separation tool, not a downloader. Its main job is processing audio you already own: drag an MP3, WAV, FLAC, OGG, or M4A onto the import bar and go. YouTube support is a convenience for content you have the right to process. StemDeck does not store, cache, or redistribute any downloaded content. Everything happens locally and nothing leaves your machine. 这是什么？StemDeck 是一个音轨分离工具，而不是下载器。它的主要工作是处理你已经拥有的音频：将 MP3、WAV、FLAC、OGG 或 M4A 拖入导入栏即可开始。YouTube 支持是为了方便处理你有权使用的内容。StemDeck 不会存储、缓存或重新分发任何下载的内容。一切都在本地进行，没有任何数据会离开你的机器。
StemDeck is a free, open alternative to cloud stem-splitters like Moises and LALAL.AI: no account, no quota, no uploads, no subscription. If you want stems for personal study and prefer to keep things local and free, StemDeck has you covered. If you need the polish, a mobile app, or deeper musician tooling, the commercial products are a better fit. StemDeck 是 Moises 和 LALAL.AI 等云端音轨分离服务的免费开源替代品：无需账户、没有配额限制、无需上传、无需订阅。如果你需要音轨进行个人学习，并且倾向于保持本地化和免费，StemDeck 是你的理想选择。如果你需要更精致的界面、移动端应用或更深度的音乐人工具，商业产品可能更适合你。
Features
功能特性
- 6-stem separation via Demucs htdemucs_6s, with auto-detection of the best Torch device (CUDA on NVIDIA, MPS on Apple Silicon, CPU fallback). 通过 Demucs htdemucs_6s 进行 6 音轨分离，并自动检测最佳 Torch 设备（NVIDIA 显卡使用 CUDA，Apple Silicon 使用 MPS，CPU 作为备选）。
- YouTube and local file import. Paste a YouTube URL or drop an MP3, WAV, FLAC, OGG/Opus, MP4, or M4A directly onto the import bar. 支持 YouTube 和本地文件导入。 粘贴 YouTube 链接或将 MP3、WAV、FLAC、OGG/Opus、MP4 或 M4A 文件直接拖入导入栏。
- DAW-style waveform editor with min/max sample rendering across all stems, shared normalization, zoom in/out/Fit, loop drag on the ruler, gold playhead overlay, and stem-aligned lanes. DAW 风格波形编辑器，支持所有音轨的最小/最大采样渲染、共享归一化、缩放（放大/缩小/适应）、标尺循环拖拽、金色播放头覆盖以及音轨对齐轨道。
- Stem subset extraction. Click stem chips to choose which stems to keep. Clicking from “all selected” snaps to “only this one”; subsequent clicks add or remove. 音轨子集提取。 点击音轨标签选择要保留的音轨。从“全选”点击会切换到“仅选此项”；后续点击可添加或移除。
- “Original” backing track. When you pick a subset, a 7th lane contains the complement (full song minus selected stems), perfect for A/B reference without doubling. “原始”伴奏轨道。 当你选择一个子集时，第 7 条轨道会包含剩余部分（完整歌曲减去选定音轨），非常适合进行 A/B 对比，且不会造成重复。
- Downloadable selected mix. A single mix.wav of just your selected stems, summed via ffmpeg amix. 可下载的选定混音。 一个仅包含你所选音轨的 mix.wav 文件，通过 ffmpeg amix 合成。
- Per-stem mixer with volume fader, mute, solo, and “monitor” (solo-only) per stem. State syncs between the preview mixer and the stems sidebar. 分轨混音器，每个音轨都有音量推子、静音、独奏和“监听”（仅独奏）功能。预览混音器和音轨侧边栏之间的状态保持同步。
- Live VU meters per stem. Post-gain RMS via Web Audio analysers with peak hold and slow falloff. 实时分轨 VU 表。 通过 Web Audio 分析器实现增益后 RMS 显示，带有峰值保持和缓慢衰减效果。
- Song analysis including BPM (librosa beat tracker), key, scale, and confidence (Albrecht-Shanahan profiles), integrated LUFS (BS.1770), and sample peak in dBFS. 歌曲分析，包括 BPM（librosa 节拍追踪器）、调性、音阶和置信度（Albrecht-Shanahan 配置）、集成 LUFS (BS.1770) 以及 dBFS 采样峰值。
- Cancellable jobs. Cancel mid-pipeline and the runner terminates the active subprocess immediately, deletes the partial job dir, and returns to ready. 可取消任务。 在处理过程中取消，运行程序会立即终止活动的子进程，删除部分任务目录，并恢复到就绪状态。
- Library panel with folder-based track organisation, drag-and-drop, search, and trash. 库面板，支持基于文件夹的轨道组织、拖放、搜索和回收站功能。
Honest Comparison
诚实对比
| Feature | StemDeck | Moises / LALAL.AI / similar |
|---|---|---|
| Price | Free, forever | Freemium; credits or subscription required |
| 价格 | 永久免费 | 免费增值；需积分或订阅 |
| Hosting | Runs entirely on your machine | Cloud; audio must be uploaded |
| 托管 | 完全在你的机器上运行 | 云端；必须上传音频 |
| Privacy | Audio never leaves your machine | Audio is uploaded to third-party servers |
| 隐私 | 音频绝不离开你的机器 | 音频上传至第三方服务器 |
| Stem model | Demucs htdemucs_6s (open source) | Proprietary models, generally higher quality |
| 音轨模型 | Demucs htdemucs_6s (开源) | 专有模型，通常质量更高 |
| Source code | Open source, forkable, self-hostable | Closed source |
| 源代码 | 开源，可分叉，可自托管 | 闭源 |
If you need speed, quality, mobile access, or the extra musician tooling, the commercial products are worth the money. If you want stems for personal study, prefer to keep audio private, or just want something that runs locally with no strings attached, StemDeck is enough. 如果你需要速度、质量、移动端访问或额外的音乐人工具，商业产品物有所值。如果你需要音轨进行个人学习，倾向于保护音频隐私，或者只是想要一个无需任何附加条件的本地运行工具，StemDeck 就足够了。