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htdemucs-ft-onnx
silverdaw/htdemucs-ft-onnx
htdemucs-ft-onnx is a audio-to-audio model from silverdaw. Use it for the audio-to-audio task on the model card, and read the license before you ship it in a product. It is set up for onnxruntime. The card lists the license as mit.
An ONNX export of the Hybrid Transformer Demucs fine-tuned 4-stem model (htdemucsft), used by Silverdaw as its backup stem-separation engine. htdemucsft is a "bag" of four specialist models — one per source — so vocal…
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Public
Updated Jun 30, 2026
Repo size
1.3 GB
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.onnx1.3 GB · 100%
At a glance
- Task
- Audio-to-Audio
- Library
- onnxruntime
- License
- mit
- Access
- Public
- Created
- Jun 30, 2026
- Updated
- Jun 30, 2026
- SHA
- 7209a856
Model card
From the Hugging Face model README
Silverdaw Backup Stem Pack — htdemucs fine-tuned (ONNX)
An ONNX export of the Hybrid Transformer Demucs fine-tuned 4-stem model
(htdemucs_ft), used by Silverdaw as
its backup stem-separation engine. htdemucs_ft is a "bag" of four
specialist models — one per source — so vocals / drums / bass / other are all
native outputs.
Silverdaw's primary engine is the higher-quality RoFormer pack pair (vocals + rhythm); this model is used when those packs are not installed, or when the user explicitly selects the backup engine.
This repository is a re-host of
StemSplitio/htdemucs-ft-onnx
so Silverdaw can serve every model it needs from one self-owned location. The
weights and the export are unchanged (byte-identical; same SHA-256).
Files
| File | Size | Stem | SHA-256 |
|---|---|---|---|
htdemucs_ft_vocals.onnx | ~302 MB | vocals | 8c5d5e2da1f27050240bb80236673307ee3b40d4b064066d9350f4d64bfd544d |
htdemucs_ft_drums.onnx | ~302 MB | drums | f76b68af36066e38885b369299b5032a861038f9b49da5aa6cf1c31cfa69cf27 |
htdemucs_ft_bass.onnx | ~302 MB | bass | 2a74d9283fc2336fcc58d50f87a7080aff57aea372f65cfe3f0211ea1ff16182 |
htdemucs_ft_other.onnx | ~302 MB | other | 90e11806c1bb558ca9d9c7e909d28a2854f7f217982e90482dbed6442513daad |
Each file is a self-contained .onnx (fp32 weights, no external .data). fp32
is chosen over the fp16 variants for the CPU execution provider, where fp16 ops
are commonly emulated (slower) rather than accelerated.
Provenance & license
License: MIT.
- Weights — © Meta / Alexandre Défossez et al., Demucs v4 (Hybrid Transformer Demucs, fine-tuned), released under MIT.
- ONNX export — © StemSplitio
(
StemSplitio/htdemucs-ft-onnx). - Architecture / paper — Hybrid Transformers for Music Source Separation
(Rouard, Massa, Défossez; arXiv:2211.08553) /
facebookresearch/demucs(MIT).
Intended use
Designed for offline (non-real-time) stem separation inside a desktop DAW. It is not a real-time audio-callback model — run it on a worker/background thread.
- Task
- Audio-to-Audio
- Library
- onnxruntime
- License
- mit
- Created
- Jun 30, 2026
- Updated
- Jun 30, 2026