I tried a very cheap USB card to see if it would serve my purpose & the results look promising with the exception being that it's mixer output level has a habit of being reduced to zero after some reboots. Looking to upgrade to something better (more stable/predictable). Balanced Audio in & out would be nice, but not an absolute must. Anyone have a favorite one they've had excellent luck with? Plug & Play without having to install software is a plus, but again, not mandatory.