Stream to airplay?

Hello guys! I’m new here… I need some guidance, I googled many times but I still haven’t found an answer.

This is my setup:
I have a computer stick with Windows dedicated only for iTunes, and a couple of Airplay receivers around the house. Now, controlling the iTunes has proven to be a problem as it always seems to disconnect from the smartphone and I can’t seem to find a way to control the playlists from another computer.

So researching, I found Volumio, which, looks like the answer to all of my problems! …but I can’t seem to find any info on airplay streaming. I know I can set it up as a receiver, but I want to know if there is a way to configure it to stream to other Airplay receivers, making it a great headless server that runs all around the house, controllable from any device. It’d be perfect!

So, any ideas? Thanks!