Hi, I briefly had a Galaxy S III before returning it (due to issues with the carrier, not the handset). I quickly tried it with the USB DACs I have using a cheap USB OTG cable. I can confirm I had success with redbook FLACs on:
* Beresford Caiman ('Gatorised')
* Sonar SPS 25 (which I believe is the same as the Edirol UA 25)
* Behringer UCA222
* iBasso D2+ Boa
... there were no failures, although on a couple of instances I didn't get it to pick up the DAC with each cable swap. I think this might be my failing to make the connection properly due to newness of the connectors.
Time was extremely tight, so I haven't been able to try more than a track on each one, and cannot vouch for stability over any period of time, battery life, sound quality, etc.
The only other useful observation might be that the volume control on the handset did attenuate the level on the USB output.
My first post, I hope it's useful to someone!
