About AIRadioScan

Two RTL-SDR receivers on separate hosts, each hopping a bank of VHF channels inside a single 2.048 MHz tuner window — so every channel is watched at once, with no scan delay. Squelch and PL/DPL tone decoding happen at the radio; audio moves over TLS-encrypted MQTT.

A spectral noise gate scores every recording on voice-band energy before anything else runs, so squelch tails and dead carrier never reach the transcriber.

Whisper large-v3, with a local faster-whisper instance on an RTX 3060 doing the heavy lifting at roughly 6–9× realtime, plus cloud and CPU tiers behind it so a single outage never creates a blind spot.

Whisper likes to latch onto a phrase and repeat it, so a loop detector collapses runs while protecting the genuine double-reads dispatch actually uses. A 2,418-street Yakima County gazetteer then repairs place names phonetically — "nay cheese" becomes Naches, "Kewich" becomes Cowiche.

Deterministic parsing pulls apparatus and unit IDs, addresses, cross streets, incident natures and determinant codes. Licence plates read over the air are detected and deliberately excluded — they carry a registered owner's address and have no business in an incident.

Transmissions become incidents by rule, never by vibes: a call is opened only by a dispatch that names a unit, a nature and a location, and later traffic attaches only when it shares a hard entity. Time can reject a link, never justify one. Every attachment stores the entity that earned it.

A local Llama 3.1 8B writes the summary — but only ever over one already-assembled incident, and only from what was actually said. The model never decides what belongs together.