SONOS and MinimServer

[Peter@57m]

Sonos has its own proprietary music server which is built directly from your music files and not from a UPnP music server.

You tell Sonos where your files are during setup using Manage Music Library / Music Library Setup. It then builds its own library (music server). As it builds this directly from the music files, its why you must Update Music Index Now when you rip or download new music.