Anatomy of a Voice Agent: VAD, STT, LLM, TTS and Why WebRTC Matters

This story is from 2026-09-23. It is preserved in the archive; the latest stories are on the live feed.

Talking to a voice agent feels simple. You speak, it answers. But behind that half-second exchange sits a pipeline of models and network decisions, and every one of them can make the conversation feel natural or painfully robotic. In this post, I'll break down the four core components of a voice ag…

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1. 2026-09-23 18:12 · DEV Community — AI
   Anatomy of a Voice Agent: VAD, STT, LLM, TTS and Why WebRTC Matters