falAudio to audioComing soon

fal-ai/sam-audio/span-separate

Name: fal-ai/sam-audio/span-separate
Brand: fal

fal-ai/sam-audio/span-separate is an audio to audio tool from fal that runs in the background and returns audio. Coming soon: listed with its price, not yet open to runs.

This tool is listed but not yet available to run.

Price pending

Pricing

Price pending.

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 process.
`prompt`	text	—	Text prompt describing the sound to isolate. Optional but recommended - helps the model identify what type of sound to extract from the span.
`spans` required	JSON	—	Time spans where the target sound occurs which should be isolated.
`reranking_candidates`	number (whole) 1 to 7	1	Number of candidates to generate and rank. Higher improves quality but increases latency and cost. Requires text prompt; ignored for span-only separation.
`acceleration`	one of fast, balanced, quality	balanced	The acceleration level to use.
`max_chunk_duration`	number 10 to 60	60	Maximum audio duration (in seconds) to process in a single pass. Longer audio will be chunked with overlap and blended.
`chunk_overlap`	number 0 to 30	5	Overlap duration (in seconds) between chunks for crossfade blending.
`use_sound_activity_ranking`	true or false	false	Use sound activity detection to rank reranking candidates based on how well each candidate's non-silent regions match the provided spans. Enables effective reranking even without a text prompt (span-only separation). Requires reranking_candidates > 1.
`trim_to_span`	true or false	false	Trim output audio to only include the specified span time range. If False, returns the full audio length with the target sound isolated throughout.
`output_format`	one of wav, mp3	wav	Output audio format.

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/sam-audio/span-separate",
    "input": {
      "audio_url": "https://v3b.fal.media/files/b/0a8853d1/T7zRmsiculA6u_V6RCF2c_man.mp3",
      "spans": {}
    }
  }'