It's not class compliant but you can access it via USB on Android FracPad version because Google is dev-compliant, not Apple
Not to split hairs here but - http://wiki.fractalaudio.com/axefx2/index.php?title=Digital_audio_(USB,_SPDIF,_AES)
- The Axe-Fx II is an Audio Class 2.0 compliant device. A class-compliant device requires no drivers. The drivers are provided by the OS manufacturer. Audio Class 2.0 also encompasses MIDI-over-USB.
Not trying to be combative here at all, just seeking clarity. Thanks again!