I have an existing Sonos system with a play base and play:1s as rears in the living room and several play:1s throughout the house in different rooms.
I am considering upgrading to the arc ultra, era300 rears and a sub 4 for the living room.
Are there any issues using “one” sonos app to control the new arc ultra, era300 & sub 4 with the old play:1 speakers throughout the house? I understand they will work separately for movies, but will music work in all speakers for the entire house with one app?

