Thank you so much, DanBa! You have no idea how happy I am right now.
The USB Audio Recorder Pro app is still somewhat buggy, but that would be fixed of course as time pass. I hope there are similar apps out in the future that's made for playing music.
Here's a picture of what I'm listening to right now:
UM, that set up is not working with other Android devices ATM eg: Transformer Prime, Nexus 4, and Galaxy Nexus.
Also, it would be marvelous for someone in UM to make an app-player or plugin for other players like PowerAMP- for PP6 usb.