Thanks for reaching out! I’d love to help you understand the activation_threshold of the VAD (Voice Activity Detection) in LiveKit. This threshold is all about the probability of audio being speech, and by default, it’s set to 0.5. Think of it as a guide: if the probability that an audio frame contains speech goes above this threshold, the system treats that frame as speech. You can adjust this value to change how sensitive the detection is: • Setting a higher threshold makes the detection more cautious, so it only picks up speech when it’s really confident. • Lowering the threshold makes it more sensitive, which can be helpful, but sometimes it might mistake background noise for speech. Sources: Silero VAD plugin | LiveKit Docs | livekit-plugins/livekit-plugins-baseten/livekit/plugins/baseten/stt.py