I am tryingg to use the Line 6 Helix pedal as USB audio interface with Loopy. The digital audio is making nasty noises indicating that the two clocks are not in sync; how do set up loopy to slave to Helix digital clock on iPad Pro?
Are you using a genuine Apple Camera Connection Kit? I've tried a cheap Chinese one and it did not work very well at all. I'v had no problems at al with my Apple CCK.