API reference · Meta

meta/demucs

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

IMAGEAsyncOpen model

Production endpoint

Send your first request

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

const apiKey = process.env.SANDBASE_API_KEY;
const response = await fetch("https://api.sandbase.ai/v1/run", {
  method: "POST",
  headers: {
    Authorization: `Bearer ${apiKey}`,
    "Content-Type": "application/json",
  },
  body: JSON.stringify({
    "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"
  }),
});

if (!response.ok) throw new Error(await response.text());
let result = await response.json();
for (let attempt = 0; attempt < 120 && !["completed", "failed", "timeout"].includes(result.status); attempt++) {
  await new Promise((resolve) => setTimeout(resolve, 2_000));
  const poll = await fetch(`https://api.sandbase.ai/v1/run/${result.id}`, {
    headers: { Authorization: `Bearer ${apiKey}` },
  });
  if (!poll.ok) throw new Error(await poll.text());
  result = await poll.json();
}
if (result.status !== "completed") throw new Error(`Generation ended: ${result.status}`);
console.log(result);

← Back to Demucs