Per-Room Music UNDER $80!

Forgot to mention, you can right-click and "cast to" in Windows, so you can control the playlist that Volumio is playing from Windows Media Player!
Recommended parts:
Raspberry Pi: amzn.to/373KL5F
USB3 Drive: amzn.to/3vwEusx
PoE HAT: amzn.to/3y87N6M
Atomic Pi Since RasPi is sold out everywhere: amzn.to/3s6eylv
Bluetooth audio receiver: amzn.to/3OP0lTT
DAC: amzn.to/3srpxX9
Add built-in speakers to a Pi: amzn.to/3s3QmA6
PoE Switch: amzn.to/37XXiYX
Audio Switch: amzn.to/3y5WCeF