I have no intention of moving to S2 since I have too many devices that are Not compatible; however, I like to group them for music.  I am also gifting a device I do NOT use to a friend who just needs a nice connected speaker.  How do I remove a single device from my system to do that on the S1?  I did this in the past when I got rid of my controller, but can’t figure out how to do it now...