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What are the key parameters and options to be aware of when using Demucs for track separation?

2025-08-22 470

When using Demucs for high quality track separation, it is important to have the following key parameters and options:

Basic Command Format::

  • The easiest way to usedemucs input_audio.mp3
  • Split tracks are saved by default in theseparated/file

Model Selection Parameters::

  • -n htdemucs_ft: Best separation using v4 fine-tuned models
  • -n htdemucs: v4 non-trimmed model, faster but slightly less accurate
  • -n hdemucs_mmi: v3 classic model for old version compatibility

Hardware-related options::

  • -d cpu: Compulsory use of CPU processing
  • -j 4: Setup uses 4 CPU cores to accelerate processing
  • --segment 8: Key parameters for reducing memory footprint

Special Function Options::

  • -n htdemucs_6s: Use of experimental six-track modeling (includes guitar and piano separation)

Users can run thedemucs --helpView all available command line parameters and descriptions, according to the actual needs of a reasonable combination of these parameters can get the best track separation effect.

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