You probably know this, but just in case...
That touch panel on your speaker lets you control your music without opening your app.
Tap twice on the play/pause button to skip to the next track.
The new PLAY:5?
Tap the left : : to lower the volume, tap the right : : to crank it up.
Swipe left to go back one track, swipe right to skip forward to the next track.
So remember, next time you want to change your tune, just tap that Sonos!