Ok, AirPlay 2 let's you run multiple speakers. So with so many different variants that Apple ships. By experiment. Here's what I found is Airplay 2 multiroom compatible. You can tell this by pulling down on the control center and clicking on the airplay icon and seeing when you click on an output if a check box on the right appears. So there's a random list of third parties that support it. But of the list seems wrong. For instance it says LG 2019 does but it doesn't discover this. Also
- HomePod mini
What are not are:
- Airport Express. This is supposed to be but isn't
AppleTV 3rd generation. Only the Apple TV 4K does apparently.
LG Series 9. Although this has worked in the past but now I can't see it as a airplay2 device or but it is controllable by HomeKit so that I can turn it on and off. Strange.
If you don't have a compatible device then the new Belkin Soundform Connect is $99 and does this. It's still in preorder and is pretty pricey. For TVs if you want them to play sound then the Apple TV 4K ia a better deal at $179.
Otherwise if you are like me and have old stereos then this is a good idea.
You can pipe your favorite tunes throughout your entire house with multi-room AirPlay 2 speaker setup.
— Read on www.imore.com/how-add-multi-room-audio-your-homepod-speakers