A Claude-built Bluetooth audio tool for every room
echo•mux is a personal tool for playing music on several Bluetooth speakers from different brands at the same time. It avoids buying a new Wi-Fi speaker system such as Sonos and instead reuses existing Edifier, Sony, and Sackit speakers. The main challenge is that each speaker can play sound with a slightly different delay, so the system needs per-speaker latency alignment.
act as multi-room Bluetooth hubs, controlled through a mobile-first web UI. support is part of the setup, so music can be started from Spotify. Extra Bluetooth antennas costing about $10 each were added to improve coverage, including outside in the backyard.
The project was built over two weeks in spare time with Claude, which also made easier to follow.
Key points
- echo•mux sends audio to multiple Bluetooth speakers at once.
- The key technical problem is matching different speaker delays.
- are used as multi-room Bluetooth hubs.
- The system includes a mobile-first web UI and support.
- Claude helped build it over two weeks and made easier.