The music is made available by a streaming server, usually a PC running media software. The SoundBridge had a high resolution vacuum fluorescent display and was compatible with various media servers, namely servers using Apple Computer's Digital Audio Access Protocol; popular servers are iTunes, or mt-daapd, Windows Media Connect, Rhapsody, SlimServer and UPnP (Universal Plug and Play) compatible servers such as TwonkyVision. 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.