# action.start Start a live translation session. ## **Properties** | Name | Type | Default | Description | |:|:-|:|:--| | webhook Optional | string | - | The webhook URI to be called. | | lang Required | string | en | The language to transcribe.
Learn more about our supported Voices & Languages [here](/guides/voice-and-languages). | | live_events Optional | boolean | false | Whether to enable live events. | | ai_summary Optional | boolean | false | Whether to enable AI summarization. | | speech_timeout Optional | number | - | The timeout for speech recognition. | | vad_silence_ms Optional | number | - | Voice activity detection silence time in milliseconds. | | vad_thresh Optional | number | - | Voice activity detection threshold. | | debug_level Optional | number | 0 | Debug level for logging. | | direction Required | array | local-caller | The direction of the call that should be transcribed.
**Possible Values:** [remote-caller, local-caller] | | speech_engine Optional | string | - | The speech engine to be used.
Learn more about our supported Voices & Languages [here](/guides/voice-and-languages). | | summary_prompt Optional | string | - | The prompt for summarization. | ## **Example** yaml andJson live_transcribe: action: start: webhook: https://example.com/webhook lang: en live_events: true ai_summary: false speech_timeout: 30 vad_silence_ms: 500 vad_thresh: 0.6 debug_level: 2 direction: - remote-caller - local-caller speech_engine: default summary_prompt: Summarize this conversation