---
title: Pipecat VAD + Smart Turn v3.2 Simulator
emoji: 🎙️
colorFrom: indigo
colorTo: purple
sdk: gradio
sdk_version: 6.19.0
app_file: app.py
pinned: false
---

# Pipecat pipeline simulator — VAD ➜ Smart Turn v3.2

Replays an audio clip through the **exact** logic pipecat runs in a live call:

```
audio chunks → Silero VAD → (after stop_secs of silence) → Smart Turn v3.2
```

The Silero VAD state machine and the Smart Turn audio-buffering / segment
extraction are faithfully ported from
[pipecat](https://github.com/pipecat-ai/pipecat). Every time VAD detects the
user stopped speaking, the buffered segment is handed to Smart Turn and the
end-of-turn decision is reported — with the exact audio that was fed to the
model playable per turn.

All VAD and Smart Turn parameters are editable in the UI:

- **VAD:** `confidence`, `start_secs`, `stop_secs`, `min_volume`
- **Smart Turn:** `pre_speech_ms`, `max_duration_secs`, `stop_secs` fallback, decision `threshold`
- **Simulation:** chunk size, trailing silence

Inference (Silero VAD + Smart Turn ONNX models) runs on the Space CPU via
`onnxruntime`.