Update: unfortunately not a good one.

I have two versions of my hardware, one of which actually has direct pic to pin access. I used this board to bypass the USB chip and try to go directly to the other audio device with no luck. My device is already in production and this is just a single variant I'm trying to create for a single test, so changing the board is not an option.

I haven't fully given up but am close. This seemed simple in concept but has proven otherwise. I'm currently looking into a small linux based single app computer that could basically function as a host just to capture and pass the signals betweent the two devices using a java program.