I have Spotify Premium in the US. I've been playing from my desktop and desktop speakers, and today I have set up Sonos1 speakers. Now it seems I can play Spotify on my desktop or on my Sonos speakers, but I can't connect the Sonos speakers to the desktop. If I use the Spotify app on my phone, it makes me choose. (The Sonos speakers are in other rooms.) I'm on a windows10 computer. I'd really like to be able to hear the same music in all rooms.