UPnP - Universal Plug and Play

Wikipedia has a detailed description UPnP.

From http://en.wikipedia.org/wiki/Universal_Plug_and_Play

UPnP Software

I found a free UPnP Server "TVersity" very easy to set up, just a few minutes then you could use IRP/F/Z to steam music from PC over LAN.

Website - http://tversity.com/

Download website - http://tversity.com/download/