Event fields
Provisional user audio item id used to correlate later transcription events and the created conversation item.
{
"event_id": "evt_input_audio_speech_started_001",
"type": "input_audio.speech_started",
"item_id": "item_audio_001",
"audio_start_ms": 1200
}
Server events
input_audio.speech_started
{
"event_id": "evt_input_audio_speech_started_001",
"type": "input_audio.speech_started",
"item_id": "item_audio_001",
"audio_start_ms": 1200
}
Emitted when the service detects user speech on the input audio stream. This can arrive before any transcription text is available.