> ## Documentation Index
> Fetch the complete documentation index at: https://docs.vivix.ai/llms.txt
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# conversation.item.input_audio_transcription.delta

Streams partial transcription text for a user audio item when transcription is enabled.

## Event fields

<ResponseField name="event_id" type="string" required>
  Unique id for this server event.
</ResponseField>

<ResponseField name="type" type="string" required>
  Event type. Must be `conversation.item.input_audio_transcription.delta`.
</ResponseField>

<ResponseField name="item_id" type="string" required>
  User audio conversation item being transcribed.
</ResponseField>

<ResponseField name="content_index" type="integer">
  Index of the audio content part.
</ResponseField>

<ResponseField name="delta" type="string">
  Incremental transcript text.
</ResponseField>

<ResponseExample>
  ```json conversation.item.input_audio_transcription.delta theme={null}
  {
    "event_id": "evt_transcript_delta_001",
    "type": "conversation.item.input_audio_transcription.delta",
    "item_id": "item_audio_001",
    "content_index": 0,
    "delta": "Show me"
  }
  ```
</ResponseExample>