if I use my TI through USB then is there any need for another soundcard. Does my PC not just crunch the numbers? Skint myself a little buying the synth (but I could pick it up that day

) and I don't really want to buy something I don't need. I notice some clicks etc but I seem to clear them with lowering volumes etc.
I have no problems recording my other gear track at a time through the TI (Beats my soundblaster and on board sound)
Any advice folks?
Kris