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falfal-ai/demucs
fal-ai/demucs is an audio to audio tool from fal that runs in the background and returns audio. Pay as you go from $0.00091 per second, with one API key.
Try itfrom $0.00091 / second
Pricing
$0.00091 per second. Measured from the input file. The final charge comes from usage.
Limits
- Runs
- In the background
- Returns
- audio
- Longest queue wait
- 3600s
- Run deadline
- 1800s
- Largest inline input
- 1024 KB
- Largest input file
- 500 MB
- Largest output
- 4768 MB
- Outputs per run
- 16
Input
| Field | Kind | Default | Description |
|---|---|---|---|
audio_url required | URL or file | — | URL of the audio file to separate into stems |
model | one of htdemucs, htdemucs_ft, htdemucs_6s, hdemucs_mmi, mdx, mdx_extra, mdx_q, mdx_extra_q | htdemucs_6s | Demucs model to use for separation |
stems | list | ["vocals","drums","bass","other","guitar","piano"] | Specific stems to extract. If None, extracts all available stems. Available stems depend on model: vocals, drums, bass, other, guitar, piano (for 6s model) |
segment_length | number (whole) 1 to … | — | Length in seconds of each segment for processing (minimum 1). Smaller values use less memory but may reduce quality. Default is model-specific. |
shifts | number (whole) 1 to 10 | 1 | Number of random shifts for equivariant stabilization. Higher values improve quality but increase processing time. |
overlap | number 0 to 1 | 0.25 | Overlap between segments (0.0 to 1.0). Higher values may improve quality but increase processing time. |
output_format | one of wav, mp3 | mp3 | Output audio format for the separated stems |
Same request in code
curl https://api.spiral.ai/v1/runs \
-H "Authorization: Bearer $SPIRAL_API_KEY" \
-H "Content-Type: application/json" \
-H "Idempotency-Key: $(uuidgen)" \
-d '{
"provider": "fal",
"model": "fal-ai/demucs",
"input": {
"audio_url": "https://storage.googleapis.com/falserverless/model_tests/audio-understanding/Title_%20Running%20on%20Fal.mp3"
}
}'