Demucs

Audio to audio

Liveby fal

SOTA stemming model for voice, drums, bass, guitar and more.

Ask your agent

Say it in your own words. Your agent picks this tool, fills in the details and brings back the answer.

Separate the vocals from the music in this song.

Clean up the background noise in this interview recording.

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How it works

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For developersSummary, tool id, API call and input schema

Voice & audio API by fal, callable through Superpowers. It costs $0.00378 per 5s clip, charged only when the call succeeds. Call it with one API key: POST /v1/run with "tool": "fal.demucs", or over MCP with run_tool.

Tool id
Price per call: $0.00378 / 5s clip

Call it

Also over MCP as run_tool

curl -X POST https://superpowers.tools/v1/run \
  -H 'Authorization: Bearer $SP_KEY' \
  -d '{"tool":"fal.demucs","input":{"audio_url":""},"idempotency_key":"example-request-1"}'

Input

7 fields · 1 required

{
  "type": "object",
  "required": [
    "audio_url"
  ],
  "properties": {
    "overlap": {
      "type": "number",
      "description": "Overlap between segments (0.0 to 1.0). Higher values may improve quality but increase processing time.",
      "default": 0.25
    },
    "shifts": {
      "type": "integer",
      "description": "Number of random shifts for equivariant stabilization. Higher values improve quality but increase processing time.",
      "default": 1
    },
    "output_format": {
      "type": "string",
      "description": "Output audio format for the separated stems",
      "default": "mp3",
      "enum": [
        "wav",
        "mp3"
      ]
    },
    "audio_url": {
      "type": "string",
      "description": "URL of the audio file to separate into stems"
    },
    "segment_length": {
      "type": "integer",
      "description": "Length in seconds of each segment for processing (minimum 1). Smaller values use less memory but may reduce quality. Default is model-specific."
    },
    "stems": {
      "type": "array",
      "description": "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"
      ]
    },
    "model": {
      "type": "string",
      "description": "Demucs model to use for separation",
      "default": "htdemucs_6s",
      "enum": [
        "htdemucs",
        "htdemucs_ft",
        "htdemucs_6s",
        "hdemucs_mmi",
        "mdx",
        "mdx_extra",
        "mdx_q",
        "mdx_extra_q"
      ]
    }
  }
}