Thank you Larry, that answers my question. I can record software audio in Sonar or various VST's without an audio recording interface...but I need the interface if I want to record the voices built-in to the QS8. I probably won't need to do that, at least initially...I'm more interested in seeing what's available in the software.

My laptop doesn't seem to have a Mic input so I'd need to buy a USB audio interface, when that time comes. I'd use the two 1/4" audio outs from the QS8. Might need 1/4"-to-RCA adapters, but that depends on the USB audio interface I end up choosing.