Feature Request: Sync volume across speakers
When adding and subtracting multiple speakers from the listening experience, oftentimes the volume levels may be different from listening in different rooms etc. When I want to play all speakers at once this often leads to me having to micro adjust them to match. A button within the volume adjustment menu to align all volume levels to match would be awesome. Additionally, a way to lock the group so that my beam+surrounds and Sonos 1 will adjust the volume together rather than individually if I’m playing music through everything.
