File	Stems	Size	Description
`htdemucs.safetensors`	4 (drums, bass, other, vocals)	84 MB	Base model
`htdemucs_ft.safetensors`	4 (drums, bass, other, vocals)	84 MB	Fine-tuned — best quality ⭐
`htdemucs_6s.safetensors`	6 (drums, bass, other, vocals, guitar, piano)	55 MB	6-stem variant

Each model has a matching *_config.json with architecture parameters (sources, sample rate, channels).

What HTDemucs Does

HTDemucs (Hybrid Transformer Demucs) separates mixed audio into individual stems:

Original Checkpoint URLs

These safetensors were converted from:

Model	Original URL
htdemucs	`https://dl.fbaipublicfiles.com/demucs/hybrid_transformer/955717e8-8726e21a.th`
htdemucs_ft	`https://dl.fbaipublicfiles.com/demucs/hybrid_transformer/04573f0d-f3cf25b2.th`
htdemucs_6s	`https://dl.fbaipublicfiles.com/demucs/hybrid_transformer/5c90dfd2-34c22ccb.th`

These models are automatically downloaded by the Mæstræa AI Workstation backend. They can also be used directly with the demucs library:

python

from demucs.pretrained import get_model
model = get_model("htdemucs_ft")

MIT — same as the original Demucs release.

Model: Facebook Research / Meta AI
Paper: Hybrid Transformers for Music Source Separation (Rouard et al., 2023)
Conversion & Mirror by: AEmotionStudio