…Is the hardware capable of acting as a USB interface?
Nice Board! The answer to the your questions is no. The USB cannot be used in this manner.
I also have a ToneX on my board. I set the H90 to Dual Routing Mode and connect Path 1 to the front of the ToneX in mono. Then, I take the outputs of the Tonex in stereo and connect it to Path 2 of the H90. Fantastic results. Never been concerned with latency.
