ONNX export of speechbrain/sepformer-whamr16k, a SepFormer (Separation Transformer) model trained on the WHAMR dataset for speech separation and enhancement at 16 kHz. It is not a newly trained model. This is an unofficial community conversion; SpeechBrain is the original author.

Source

Field	Value
Upstream model	speechbrain/sepformer-whamr16k
Upstream source revision	`21a5b500c6f52fddc387c5d9e5fb13ffd6f039c5`
Export tool/script	`torch.onnx` export from SpeechBrain pretrained checkpoint
Quantization recipe	FP32 ONNX graphs (`sepformer.onnx`, bundled `osd.onnx`)

Files

File	Size	Description
`sepformer.onnx`	~101 MB	SepFormer separation / enhancement model
`osd.onnx`	~6 MB	Overlapped-speech-detection model (bundled alongside the separator)

Intended Use

Speech separation / enhancement for local inference via ONNX Runtime. The model separates speech from additive background noise and reverberation, producing cleaner audio for downstream VAD, diarization, or ASR. The ONNX export removes the SpeechBrain framework dependency for more portable deployment.

Runtime Notes

Designed for ONNX Runtime compatible runtimes.
Expected input: 16 kHz mono audio.
The model outputs 1 or 2 separated source streams depending on configuration.
Validate on the target execution provider before production use.

Precision and Packaging

Export tooling, precision, and quantization are recorded in the Source table above. This packaging mirror does not publish independent parity benchmarks; validate on your target execution provider before production use.

Limitations

Trained on English speech with WHAM! noise conditions; performance on other languages or very different noise types is not evaluated in this repo.
Trained at 16 kHz; input audio at other sample rates must be resampled.
Source separation is computationally expensive; expect latency on CPU.
ONNX export fidelity relative to the SpeechBrain PyTorch model is not documented here.

License

Apache 2.0 — inherited from speechbrain/sepformer-whamr16k. This packaging repo adds no new license terms.

tonythethompson/SepFormer-WhamR16k-ONNX

SepFormer WHAMR 16kHz — ONNX