How to Build a Local Intercom with Zigbee and Snapcast

What this episode covers

Daniel wants to build a home intercom using his existing Zigbee sirens and Snapcast speakers — but getting push-to-talk audio and TTS announcements to interrupt Music Assistant's stream is a classic smart home puzzle. We break down three approaches: the simple cloud-dependent workaround, the Snapcast meta-stream mixing method, and the hard cutover strategy using Snapcast's JSON-RPC API. We also tackle the microphone side, explaining why Icecast introduces too much latency and how a walkie-talkie-style recorded clip approach sidesteps the streaming complexity entirely. Plus, a deep dive on using MQTT to trigger specific siren melodies for doorbell, help button, and alert tones.

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