@Sawyer-McBride Mine is blue, has "3D SOUND" printed on it and was cheap, probably from DealExtreme or Banggood, probably less than £2.50 .
My kmod-usb-audio installed:
root@Omega-1CD5:~# opkg list-installed|grep audio
kmod-usb-audio - 3.18.20-1
libaudiofile - 0.3.6-3
but then, I am on 3.18.23. Be aware that upgrade took /overlay away from my USB-stick and I had to modify fstab again.
Still haven't connected to sound yet.

Thank you Kit and Fader! Oddly it was actually looking for an older version! I am on 3.18.23.
--force-depends install works a treat. I'm now filling my 8 gig stick with software that will probably turn out useless but I can't tell otherwise what will work.
I sure wish gforth was available.

Thanks, fader. I didn't realize it hadn't been built yet. It is listed in:

opkg list | grep audio | grep usb

Of course,
opkg list | grep usb
leaves a lot of experimenting yet to be done! Sadly, "opkg install sox" on most of these (sox here used as example) gives:

• satisfy_dependencies_for: Cannot satisfy the following dependencies for sox:
• kernel (= 3.18.20-1-7bed08fa9c06eb8089e82c200340ec66) *
• opkg_install_cmd: Cannot install package sox.

On the other hand, usbreset does seem to work so there is a connection to the 3D dongle.

I am very interested in this as I intend to use the Omega and the "C-Media Electronics Inc." dongle as a wi-fi intercom for use in a community theatre for communication among the crew.