Can’t you save the group as a Named Group? It won’t save the mute setting, but it will save the rest.

So essentially you want the sound from the TV in the physical room 1 to play on the Era 100 that is also in that physical room and on the Ray in physical room 2, while the Ray in physical room 1 is silent?

It looks like you have three “rooms” in the app, the Ray an the Era in physical room 1 each have their own “rooms” in the app, while the Ray in physical room 2 also is a “rooms” in the app.

What you want  can indeed only be achieved by grouping all three “rooms” and turning the volume down on the Ray in the  physical room 1. You could use “group all” (tap on the room that represents the Ray in physical room 1 and tap “Anywhere” (I’m translating form Dutch here, so it might be worded differently) in the top left corner). Make sure “Ungroup on Autoplay” is off in the settings of the speakers.

I’m sorry, but I have to ask . . . what use is having the audio from TV 1 coming out of the soundbar for TV 2?  Also, what use is having the audio from TV 1 coming out of the Era 100, but not coming out of the soundbar for TV 1?  Seems bizarre, not even counting that the lip sync problem due to the delay for grouped TV sources would drive me bonkers.

The environment is a small salon with high ceilings where room 1 and room 2 are adjacent (separated only by a wide opening). The Era is mounted high while the TV/Ray in room 1 is “right in the face” of a stylist. … We originally added the Era by itself to divert sound from the TV using ApplePlay which worked with less reliability. … Lip-sync delay isn’t much of a concern for now; they are accustomed to using the TV to source streaming music (without having to get into a phone app and they have persistent visual of what’s playing). We may do some Sonos training but right now it is like trying to train on a residential appliance with too many buttons vs. Speed Queen (if that makes any sense).

My first thought is that I tried that and it won’t save the TV as the source, but maybe it will if I create the group beginning with the room 1 TV/Ray. Will experiment with that further!

After further experimentation, ​@controlav and ​@106rallye have the answer, which is to create a Group of all 3 “rooms” and make sure that “Ungroup on Autoplay” is turned off for both TV/Ray “rooms.” … Leaving “TV Autoplay” on lets whichever TV is turned on last take over as the source, which I think is what we want because we’re using Pandora on the TVs as the source music, but otherwise keeps the group together and the last volume settings retained. As ​@controlav suggested it does not restore room 1 TV/Ray muted but as volume 0.

The difference between muted and volume 0 is that when the group’s volume is increased the muted speaker’s volume doesn’t get raised. Similarly a muted speaker doesn’t contribute to the group’s combined volume number calculation.