I have no problem using the app to play music from the music service Napster. but when I try to play music using Sonos Voice Control, it says that it cannot do that until I register with a music service. I tried to name Napster as my default music service but the app says that Napster is incompatible. I m using the app with the Sonos Roam, which I will have to return if I can’t play music with the voice controls (which is why I bought it).