Sorry I just remembered that Jellybean is now available via OTA, ignore my previous.

To my knowledge the required usb drivers are only available in the jellybean Rom for the hox, as mentioned earlier in this thread.

Are your Android device rooted and running custom Roms?

Ok guy's this info is now outdated as of today I can confirm that Android devices with a Micro USB port capable of running Android Jellybean 4.1 now support playback via USB, so you can connect your DAC's :D   Look here http://www.head-fi.org/t/608713/htc-one-x/60   Enjoy!

I think it comes down to support being added to the jellybean kernel, not device specific. In theory any android device with usb port that can run custom jellybean firmware should work. But I can only confirm my own findings. I bought the kids a 7 inch tablet for Christmas that run stock...

Hi Guy's n Gal's thought i'd make every HOX owners day by confirming that USB audio out is now fully working on the HOX!!   I purchased the Fiio E17 and recieved it today 04/01/13 my HOX is a Orange branded Tegra 3 phone which is running custom firmware (Android Revolution HD Jellybean 4.1...