SoundBridge is a hardware device from Roku, Inc. designed to play internet radio or digital audio streamed across a home network, over either Wi-Fi or ethernet.
However, the Roku SoundBridge can still access radio streams stored in its 18 URL presets.
The music is also made available by a streaming server, usually a PC running media software.
Some of these servers run not only on PCs but also on NAS devices like the Linksys NSLU2, so a SoundBridge could be operated without a PC.
Pinnacle and Roku promoted the Firefly Media Server as an alternative that offers similar functionality.