Using both Traktor DJ 2 and dJay 2 I only get sound out of the headphones output, not the main. dJay sees the Traktor interface and assigns the main to ch1-2 and headphones to ch3-4 but there's no output on main.
It works fine. Here's how:
https://community.algoriddim.com/t/traktor-audio-2-doesnt-work-anymore-all-of-a-sudden-djay-pro-1-4-5/16153/5?u=miguelito
I'm experiencing the same issue. The main output is working with traktor pro on my desktop. Probably new iOS update needed...?