OK - I have AMAZON ECHO in the left side of the screen and when I choose it I have a number of VOICE COMMANDS that I can do - you create these on Systen Design Add Trigger Name (let me know if you don't know how to do that. My trigger name was SPEAKERS ALL.
When that is activated the ONE LINE that is executed is:
Play Pandora Station: Bills Radio Station In Room(s) Main> Debbies Closet, Main> Living Room, Main > Kitchen, Main> Study.....
That is it -
The Turn off Speakers all Executes:
Turn off Study
Turn Off Kitchen
Turn off Living Room etc
I turn off ALL rooms on turn off because even though I may not have turned them on turning them off is not an issue and makes sure you don't orphan any speakers.
Let me know if you have questions - this works a treat.
You could have Trigger phrases like:
Turn on Speaker Kitchen
Turn on Main Set (set ot three speakers for example)
If I want to play a specific song or playlist then I use airplay from my phone to play throughout the house from my phone. We recently had a celebration of life at my house for friend that passed. Each person was asked to bring some of their favorite songs and each got to play one song in memory. Each person simply attached to my airplay and it played through out the house while pictures of my friend were on the projection screen in the media room and on all televisions as well.
This allowed multiple people to play different songs on my sound system throughout the house.