Troubleshooting:

Music is not playing from all Sonos speakers – Desktop

Music is not playing from all my Sonos speakers.

Solution: Group all Rooms in Sonos app

1. Install Sonos app for your computer.

2. Open Sonos app on your playback device. Go to Rooms > Group.

3. A pop-up will open. Check all Rooms > Done.

4. Open Atmosphere. Go to Settings (⚙) > Select Output Device > Connect with your Sonos group.