Use HomePod with iTunes on PC
You can use HomePod or HomePod mini to play music from the Apple Music catalogue. After you set up your HomePod, it plays audio directly from Apple Music, or audio sent from an iPhone, iPad, iPod touch or Apple TV. See the HomePod User Guide.
In the iTunes app on your PC, do any of the following to play music:
Click the AirPlay button at the top of the iTunes window, then select the tick box next to HomePod.
Whatever song you were playing in iTunes on your computer, now plays on HomePod too.