Introducing Bark! Low-latency multi-receiver live-sync lossless audio streaming for local networks. It's like Sonos, but open source, so nobody can brick your devices remotely. It's also written in Rust :)

https://github.com/haileys/bark

It sends 48khz uncompressed float32 data over UDP multicast. It can achieve playback sync to within hundreds of microseconds in ideal conditions, and usually to within a millisecond.

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HomePlug 1.0 and AV are the two versions of the specification for home networking technology that connects devices to each other through the power lines in a home

"eliminates the need to manually reconfigure your network settings when you move your desktop/laptop computer to another location. (...)can configure your IP settings, proxy settings, mapped drives, default printer, wallpaper, and screen resolution (...)"

"With Hamachi you can organize two or more computers with an Internet connection into their own virtual network for direct secure communication.
Hamachi is fast, secure and simple. It is also free. "