API reference · Meta

meta/demucs

Integrate this model through SandBase's unified API, with production-ready schemas and examples.

IMAGEAsyncOpen model

Production endpoint

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OpenAI-compatible endpoint with unified authentication and usage tracking.

POSThttps://api.sandbase.ai/v1/run

Model IDmeta/demucs

Input Schema

6 parameters · 0 required · 6 optional

Parameter	Type	Required	Description
`audio`	string	Optional	URL of the audio file to separate into stems
`stems`	string[]	Optional	Specific stems to extract. If None, extracts all available stems. Available stems depend on model: vocals, drums, bass, other, guitar, piano (for 6s model) · Default: ["vocals","drums","bass","other","guitar","piano"]
`shifts`	integer	Optional	Number of random shifts for equivariant stabilization. Higher values improve quality but increase processing time. · Min: 1 · Max: 10 · Default: 1
`overlap`	number	Optional	Overlap between segments (0.0 to 1.0). Higher values may improve quality but increase processing time. · Min: 0 · Max: 1 · Default: 0.25
`output_format`	string	Optional	Output audio format for the separated stems · Options: wav, mp3 · Default: "mp3" wavmp3
`segment_length`	integer	Optional	Length in seconds of each segment for processing. Smaller values use less memory but may reduce quality. Default is model-specific.

Output Schema

Field	Type	Description
`id`	string	Unique identifier for the generation task
`status`	string	Task status: pending, running, completed, failed, timeout
`model`	string	Model used for the generation
`outputs`	array	Array of output items
`outputs[].url`	string	URL of the generated artifact
`outputs[].content_type`	string	MIME type (e.g. image/png, video/mp4)
`error`	object \| null	Error details if failed, null on success
`error.type`	string	Machine-readable error type code
`error.message`	string	Human-readable error description

Async Workflow

This model uses asynchronous execution. Submit a request and poll for the result.

Submit — POST to /v1/run, receive an id
Poll — GET /v1/run/{id} until status is completed, failed, or timeout
Retrieve — Read outputs from the completed response

Code Examples

Ready-to-run snippets

# Step 1: Submit
curl -X POST https://api.sandbase.ai/v1/run \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -d '{
  "model": "meta/demucs",
  "audio": "https://static.sandbase.ai/examples/meta/demucs/input_audio_0.mp3",
  "stems": [
    "vocals",
    "drums",
    "bass",
    "other",
    "guitar",
    "piano"
  ],
  "shifts": 1,
  "overlap": 0.25,
  "output_format": "mp3",
  "prompt": "a beautiful sunset over mountains"
}'

# Step 2: Poll result (replace <id>)
curl https://api.sandbase.ai/v1/run/<id> \
  -H "Authorization: Bearer YOUR_API_KEY"

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