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Updated Speechmatics STT integration #4359

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Updated Speechmatics STT integration #4359

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@sam-s10s sam-s10s commented Dec 22, 2025

What's Changed?

  • Migrated from Speechmatics Real-Time SDK to new Voice SDK
  • Improved performance of the STT engine
  • Improved handling of speaker start / end events
  • Better handing of background speakers when in focus mode

Deprecation Warning

  • The end_of_utterance_mode has been changed to turn_detection_mode to reduce ambiguity
  • Use TurnDetectionMode.EXTERNAL (default) for any VAD within LiveKit
  • Use TurnDetectionMode.ADAPTIVE or TurnDetectionMode.SMART_TURN to use the plugin VAD / turn detection

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