hi my speechmatics configurations in below ```stt=speechmati LiveKit Community #ask-ai

hi, my speechmatics configurations in below; ```s...

colossal-glass-16853

12/26/2025, 9:18 AM

hi, my speechmatics configurations in below;

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stt=speechmatics.STT(
    api_key=os.getenv("SPEECHMATICS_API_KEY"),
    language="tr",
    additional_vocab=additional_vocab,
    end_of_utterance_silence_trigger=0.2,
    operating_point=OperatingPoint.ENHANCED,
    max_delay=0.8,
    end_of_utterance_mode=EndOfUtteranceMode.FIXED,
    transcription_config=TranscriptionConfig(audio_filtering_config={"volume_threshold":3.4, "streaming_mode":True})
),

is volume threshold enough for reducing background noises

tall-airline-16756

12/26/2025, 9:18 AM

Thanks for reaching out, Eray. I'm an AI assistant and I'm here to help. Give me a moment while I research this topic.

tall-airline-16756

12/26/2025, 9:18 AM

Thanks — you're asking whether

volume_threshold=3.4

in your Speechmatics

audio_filtering_config

is enough to reduce background noise. Short answer: I cannot confirm that 3.4 is sufficient. The Speechmatics volume threshold behavior and effective values are not documented here, and LiveKit's built-in noise cancellation (Enhanced Noise Cancellation / BVC) is separate from Speechmatics' internal filtering. What you can do next: • Test empirically with sample recordings in your target environment and try several threshold values (lower and higher than 3.4) to see how transcription quality and false triggers change. • Combine approaches: enable LiveKit's Enhanced Noise Cancellation for the transport layer (WebRTC/SIP) to reduce background noise before it reaches Speechmatics. • If you want, tell me: 1) a short clip description (type of noise), and 2) whether you can enable LiveKit noise cancellation — I can suggest test values and a simple test plan to find an optimal threshold. Sources: Using Noise Cancellation for SIP and WebRTC Participants | Speechmatics STT plugin guide | LiveKit docs

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