Exactly what ckangis said. DO NOT integrate Sonos with Crestron it will be a complete nightmare for you. I am dealing with a system now, where it will work great for a couple of days before it completely stops communicating. We're restarting slot2 (Sonos modules) daily and you just don't know if it will work for a week or half a day. Even added a relay controlled receptacle to reboot that complete POS.