Continuing to investigate, everything works perfectly fine on my laptop, which is also running Producer X3e on windows 10, with the 192. However, on the desktop, my only audio driver options are Main out L, or headphones Left (so even that isnt playing right). I have no idea where to go with this...I tried reinstalling the UC drivers with no change...I could try reinstalling X3, but my Platinum demo showed the exact same thing. Yay life.