iOS USB descriptor debug

I'm looking for someone who can help me debug an audio device USB descriptor. The device works on OS X, Linux and Windows, but iOS isn't too happy about it.

Are there people here who can help or consult in debugging this? The goal is to tweak the firmware of the box at www.henryaudio.com so that it works with USB Audio Class 1 in iOS, not just UAC2.

Best regards,

Borge