Optional urlPublic URL where the audio can be downloaded.
Optional base64Base64-encoded audio data.
Optional mimeMIME type of the audio (e.g. 'audio/mpeg', 'audio/wav').
Optional durationDuration of the generated audio in seconds.
Optional sampleSample rate in Hz (e.g. 44100, 48000).
Optional providerProvider-specific metadata (job ID, generation params, etc.).
A single generated audio artifact.
At least one of url or base64 will be populated depending on the provider's response format.