Pretty good gear for a novice
as for recording to or playback from the puter, it will have to be on
you can play records fine without the computer on
as for the output / input routing.. I dont have that much experience with that mixer.. is there a booth output? (cant remember on this model)
what tape outputs do you have on the mixer?
I would connect booth out or tape out to Apogee..
and then house out to AMP