tech.mytrapp.com: A Voice Assistant That Never Touches the Cloud

I Built My Family a Voice Assistant That Never Touches the Cloud

What this is: the implementation guide for a LAN-only family voice assistant. The client is a thin browser page: at home it runs on a wall tablet, and the same page works on any phone or laptop. The server is one Python file: a hand-rolled WebSocket endpoint that does voice activity detection, streaming speech to text, deterministic routers for facts, a scoped local brain for the rest, and text to speech through a three-layer voice chain that ends in an OmniVoice model fine-tuned on 213 clean voice lines of Reach Cortana from my own legally-owned MCC install. No cloud speech service, no cloud brain, no monthly fee. ...

September 6, 2026 · 35 min · David Trapp, Systems Engineer, CISSP