Ubuntu handbook has instructions on how to get Airplay up and running on a Linux box via shairport-sync.
With these instructions, here is what I did for my desktop.
$ aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: PCH [HDA Intel PCH], device 0: ALC662 rev3 Analog [ALC662 rev3 Analog]
Subdevices: