Some users have reported my livekit agent isn't picking up their speech even though they can see their microphone is receiving correctly. Checking on livekit cloud insights I see no audio recorded at all. But some of the logs do include "input speech hasn't started yet, skipping silence padding, recording may be inaccurate until the speech starts"

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

• Observability is • I'm running livekit-agents 1.5.2 (pypi) • No • Only some, and for one user it occured once but on the 2nd time worked fine https://cloud.livekit.io/projects/p_52cs00mzqow/sessions/RM_RZxvsRJrpLJH/

Thanks — this is helpful. I’m responding to your note that observability is enabled, you’re on livekit-agents 1.5.2, recording isn’t disabled, and the issue is intermittent for some users (one user had it once then it worked). Next steps I recommend—please try them and share results or the requested logs: 1. Enable debug logging on the agent and reproduce the issue for a user who experienced it. Share the log excerpt around the "input speech hasn't started yet..." message (±10–20 lines). 2. While reproducing, confirm whether raw audio frames reach the agent: ◦ Look for logs showing incoming audio frames or audio buffer sizes before VAD logs. If frames arrive but VAD never triggers, VAD sensitivity is likely the issue. 1. Adjust VAD sensitivity (Silero VAD): ◦ Lower

activation_threshold

(make detection more sensitive). ◦ Reduce

min_speech_duration

and/or

min_silence_duration

if speech segments are short. 1. If you use server-side turn detection (real-time STT models), try lowering the

threshold

and shortening `silence_duration_ms`/`prefix_padding_ms`. 2. Toggle enhanced noise cancellation in room options for affected users and retest—this often helps in noisy environments or with low-volume speech. 3. Confirm session upload completed after the call: check for "uploading session report to LiveKit Cloud" and "finished uploading" in logs. If missing, include shutdown/crash logs. Please paste: • The debug log excerpt around the VAD message, • SDK (agent) config snippet showing VAD or turn-detection settings if you’ve customized them, • Room/session ID (you already shared RM_RZxvsRJrpLJH — thanks). With the logs and any VAD config you’ve set, I’ll pinpoint whether this is capture vs. VAD sensitivity vs. upload issues and give the exact config change to try. Sources: examples/frontdesk | livekit/livekit_composite | DeepWiki | Using a transformer to improve end of turn detection | LiveKit | Silero VAD plugin | LiveKit Documentation | Turns overview | LiveKit Documentation | Agent session | LiveKit Documentation, with interactive elements