The latest RME Hammerfall dsp drivers for the Digiface mention adding loopback functionality and saying that any outputs can be added to any input.

I can't seem to make it work. If you have Giga on the same machine, it seems you could take the Giga output and route it into the DAW (in my case, SX 3) input with the soundcard and the Totalmix (as opposed to Rewire or vst).

I'm probably confused...could someone clear this up for me?