Usage & Latency
Real-time PostHog metrics
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Total sessions
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Avg session duration
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Avg actions / session
Voice Turn Latencies
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TTS Phase 1 Latency (ms)
TTS Phase 1 — weekly p50 / p95
Time to first TTS audio (event tts_phase1_ready)
Voice Turn Latency (ms)
Total turn latency — p50 / p95
STT + LLM + TTS (event voice_turn_complete)
STT Latency — p50 / p95
Speech recognition only (stt_latency_ms)
Welcome Audio — cache hit vs miss
Welcome audio latency (p50)
Pre-generated (hit) vs on-the-fly (miss)
Weekly Sessions
Sessions and average duration
Completed sessions per week (event session_ended)
Phase Trends (weekly)
Phase latency — weekly p50
Total / STT / Recording (event voice_turn_complete)
Note : TTS Phase 2 data (event tts_phase2_ready) is available but not displayed here for readability. It shows the phase1→phase2 delta (property phase1_to_phase2_ms).