The cheapeast SqueezeLite esp32 Audio wireless multirooms
This is a demo of multirooms audio with 3 devices A B and C using an ESP32 MUSE board (20$). Multirooms is great at home when you want to have the same music synchronized in you living room, kitchen, bathroom without the need of moving a bluetooth speaker and a phone with you, or worst having a very loud distorted music in one room hoping to hear in every room.
For louder music a speaker could be attached to the board.
Using Squeezlite ESP32 and Logitech Media Server
Turorial is here :
https://forum.raspiaudio.com/t/multir...
More info here :
https://raspiaudio.com/muse