Example

{
    "event_id": "event_4950",
    "type": "response.output_audio.delta",
    "response_id": "resp_001",
    "item_id": "msg_008",
    "output_index": 0,
    "content_index": 0,
    "delta": "Base64EncodedAudioDelta"
}

response.output_audio.done

Returned when the model-generated audio is done. Also emitted when a Response is interrupted, incomplete, or cancelled.