HT-Demucs v4
Estimate vocals, drums, bass and other accompaniment from a mix.
SeparationOpen-source code
- Start here
- Separate a short mix you know well. Solo each stem, then hear it in the intended remix to judge bleed and transient damage.
- Training data
- MUSDB18-HQ plus 800 additional songs, according to the repository.
- Training rights
- MUSDB has research restrictions; the additional songs are not released as an open training collection.
- License & output terms
- Repository release: MIT. Training recordings retain their own rights.
- Limitations
- Stem bleed and artifacts remain. The original Meta repository is archived; the six-source variant has weak piano separation.
- Technique
- Hybrid waveform / spectrogram transformer
- Runtime
- Local CPU/GPU inference; higher-quality settings increase processing time.
- Parameters
- Not itemized for this release/family. Parameter sizes shown elsewhere may exclude encoders, decoders or other runtime components.
Sources reviewed . Training and rights notes summarize provider disclosures. A model license does not clear every source recording or generated output. Parameter counts refer to the named variant or component, not total runtime memory.