Building a Continuous Voice Interface with the...

A technical walkthrough of how the ABD Assistant voice command system works end-to-end, from raw microphone bytes to tool execution. The Core Architecture The system has three moving parts: a browser Web Audio capture layer, an Express WebSocket relay, and OpenAI's Realtime API as the voice brain. The browser streams PCM audio directly to OpenAI via a WebSocket that stays open for the entire session. OpenAI performs server-side voice activity detection (VAD), transcribes speech incrementally, ru