Is there a way to use mix of outputs of interface instead of separate channels?

[bullmoon]

I'm doing that using an RME interface with one of the outputs set to loopback so that any input to that output are mixed and then appear on the corresponding input. Some interfaces other than RME may be able to do this, but if not, there is software that might work.

This guy has a setup that could do that thru his DAW, I think - https://forum.jamkazam.com/showthread.ph...ht=booster