I have a client setup with a Playbar and play:1s setup as a separate rooms with them labeled surround left and surround right. The volume button on TC control just the playbar and the play:1s are controlled by buttons on the screen, "Left Surround +, Left Surround -, Right Surround +, Right Surround -. TC groups the play:1s to the Playbar as well. So far it still works, but I don't know for how long with the changes with Sonos. Client prefers this as he is hard of hearing and the room is challenging 2 story room.