Bump demucs from 4.0.1 to 4.1.0

[dependabot]

Bumps demucs from 4.0.1 to 4.1.0.

Changelog

Sourced from demucs's changelog.

V4.1.0, 11th of July 2026

Packaging overhaul: the project now uses pyproject.toml with the hatchling build backend, and is developed with uv. The requirements files and conda environment files are gone: dependencies are declared in pyproject.toml, with separation-only dependencies as the base, and train / quantized extras. Minimum supported Python version is now 3.10, and torch 2.1.

Removed torchaudio for inference: audio decoding now goes through sphn with a fallback on ffmpeg for other formats. Wav files are written directly (16 / 24 bits PCM or float32), flac encoding goes through ffmpeg (which is now required for flac output). torchaudio remains a training-only dependency. The Wiener filtering code from Open-Unmix is now vendored (MIT) in demucs.wiener, removing the openunmix dependency.

Checkpoints are loaded with weights_only=False for compatibility with torch >= 2.6.

Fixed -s/--sig being silently ignored: it now loads the model from the local dora XP.

Many bug fixes following an audit: torch.hub dependency list, local repo checkpoints with hyphens in their name, max_batches off by one, Separator.separate_tensor no longer modifies its input in place, error paths raising the wrong exception, aborting from a callback now cancels pending chunks.

Pretrained models are now hosted on the HuggingFace hub (as safetensors, including the diffq quantized ones, prepared with the new tools/export_hf.py). get_model first looks up bag of models names on the hub, falling back to the legacy AWS repo (single signatures still come from there). Names of the form hf://[namespace/]name force loading from the hub, e.g. demucs -n hf://someuser/htdemucs.

Get models list

Check segment of HTDemucs inside BagOfModels

Added api.py to be called from another program

Use api in separate.py

Added --other-method: method to get no_{STEM}, add up all the other stems (add), original track substract the specific stem (minus), and discard (none)

Added type HTDemucs to type alias AnyModel.

Improving recent torchaudio versions support (Thanks @​CarlGao4)

Commits

• See full diff in compare view