In the FWIW department, I wanted an easy way to spin up all my music to all speakers in my house as well as be able to quickly adjust volume, skip & pause.
So if anyone is interested, here’s the initial version of my little app. MIT open source in C#. Suggestions welcome.
https://github.com/nhustak/HotSonos
BTW, I mapped my controls to the keypad which I never use - add/subtract for volume, multiply for pay and divide for restart.