UPnP Protocol For those who don't know what UPnP is : Some tilme ago someone in the help forum was asking if it was possible to use UPnP and AU3 .... Well UPnP can access all UPnP compatible devices and retrieve information from it. And the beauty of this all is, it can not on retrieve info from it, it can also control it remotely !! Like you can add port forwarding in your router, remotely. Or block ports etc. So in theory you can access the sound volume button on your UPnP Media