xonaru3.txt

It is supported well as any USB-sound device. 
Long story: by default I've experienced problem with this sound card (clicking sound).
After some investigations I found the problem (wrong sample rate)
and here is the solution: By default sample rate has been was set to 44100 which is wrong for this card.
To check your configuration run this:

pacmd list-sinks

If it does not display: 

sample spec: s16le 2ch 48000Hz

for your card, you'll need to change it to 48000 in ~/.pulse/daemon.conf by 
(creating directory and new file if needed) this line should be added (just single line is OK!):

default-sample-rate = 48000

After this sound quality greatly improves and clicking sounds disappear.

Also, both 14.04 and 16.04 sometimes don't switch the output (even worse, sometimes Dummy output appears). Solution:

pulseaudio -k
(once you insert the card). I use pavucontrol to tune volume.

https://chrisjean.com/fix-for-usb-audio-is-too-loud-and-mutes-at-low-volume-in-ubuntu/