StemSplitterLab

Credits

HTDemucs weights

Meta Demucs, MIT License. Copyright (c) Meta Platforms, Inc. and affiliates.

https://github.com/facebookresearch/demucs

The ONNX file htdemucs_embedded.onnx is the embedded export published by timcsy as timcsy/demucs-web-onnx. htdemucs_fp16w.onnx is that same graph with weights stored as float16 and cast back to float32.

htdemucs_6s_fp16weights.onnx is the six-stem HTDemucs graph (drums, bass, other, vocals, guitar, piano), MIT, published by StemSplit as StemSplitio/htdemucs-6s-onnx.

demucs-web

MIT License. The separation worker uses DemucsProcessor from the demucs-web package.

https://github.com/timcsy/demucs-web

ONNX Runtime Web

MIT License. Microsoft.

https://github.com/microsoft/onnxruntime

MIT License

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

SoundTouch JS

LGPL-2.1. Used unmodified from the soundtouchjs package for real-time tempo and pitch.

https://github.com/cutterbl/SoundTouchJS

https://www.gnu.org/licenses/old-licenses/lgpl-2.1.html

@breezystack/lamejs

The MP3 encoder is a build of LAME compiled to JavaScript. LAME is LGPL. Used unmodified from @breezystack/lamejs.

https://www.gnu.org/licenses/old-licenses/lgpl-2.1.html

Practice quartet

public/samples/practice-quartet is a 128 kbps MP3 of a track synthesized for this project (formant-sung vowels, drums, bass, and a pad) and is dedicated to the public domain under CC0 1.0. It is not a recording of anyone else’s song.

Last updated 1 October 2026