GET

/v1/schemas/fal/audio/fal-ai%2Fstable-audio-25%2Faudio-to-audio

kind inputactivity audiohash b87e3f53extracted Jul 6, 2026version currentsource upstream spec ↗

Request body

8 properties · 2 required · 0 $defs
propertytypedescriptionconstraints
audio_url*stringThe audio clip to transform
prompt*stringThe prompt to guide the audio generation
sync_modebooleanIf `True`, the media will be returned as a data URI and the output data won't be available in the request history.default: false
guidance_scalenumberHow strictly the diffusion process adheres to the prompt text (higher values make your audio closer to your prompt).1 ≤ n ≤ 25 · default: 1
seedintegernullable
strengthnumberSometimes referred to as denoising, this parameter controls how much influence the `audio_url` parameter has on the generated audio. A value of 0 would yield audio that is identical to the input. A value of 1 would be as if you passed in no audio at all.0.01 ≤ n ≤ 1 · default: 0.8
num_inference_stepsintegerThe number of steps to denoise the audio for4 ≤ n ≤ 8 · default: 8
total_secondsintegerThe duration of the audio clip to generate. If not provided, it will be set to the duration of the input audio.1 ≤ n ≤ 190 · nullable

Validate a payload

before you spend tokens
shell
$ curl -X POST https://modelschemas.com/v1/validate \
    -d '{"provider":"fal","endpointId":"fal-ai/stable-audio-25/audio-to-audio","payload":{…}}'
→ {"valid": false, "errors": [{"path": "#", "keyword": "required", …}]}