Optional title used for the generated transcription files.
song_id
—
Generated song ID from song_id in a /generate/song response. Provide exactly one audio source.
audio_url
—
Public HTTPS URL or data URI for an MP3, WAV, or M4A file between 10 seconds and 10 minutes and no larger than 100 MB. Provide exactly one audio source.
upload_audio_id
—
Audio ID returned by /files/upload with purpose='audio'. Provide exactly one audio source.