I would be interested in buying the URD if the USB input/output section would accept and pass on an external LPMC multichannel signal. I did ask the Schiit AI this question and its answer was no, it is only for stereo. I accept this as gospel since it came directly from Schiit, so I won't buy it. I do wonder, however, why they have developed a USB system and format that is unlike any others out there. All other USB 2 circuits accept and pass on LPCM signals as far as I know. Maybe you could verify since you have the URD?