---
license: mit
tags:
  - onnx
  - onnxruntime
  - source-separation
  - htdemucs_6s
  - webgpu
base_model: StemSplitio/htdemucs-6s-onnx
---

# htdemucs_6s — WebGPU-compatible ONNX

A constant-folded copy of [`StemSplitio/htdemucs-6s-onnx`](https://huggingface.co/StemSplitio/htdemucs-6s-onnx)
(htdemucs_6s: drums, bass, other, vocals, **guitar**, **piano**).

The only change: the original's embedded inverse-STFT contains a `ConstantOfShape` op that
onnxruntime-web's **WebGPU** backend cannot run. Because the input window is fixed
(`mix [1,2,343980]`), that node's output shape is static, so it was folded to a `Constant`
offline (ONNX Runtime `ORT_ENABLE_BASIC`). The result is **bit-identical** to the original
(same `mix → stems [1,6,2,343980]` I/O) but runs on WebGPU in the browser.

Used by the [Audio Split](https://huggingface.co/spaces/kramp/audio-split) Space. MIT, per the
base model.