Cutting a volcano sound effect in garageband to sound like a creamy whallop on a kick drum doesn't sound like creamy whallop on a kick drum. It sounds like a volcano. A very short one. Then, when I try to edit the thing again, my mac slows to the point of molasses and garageband crashes. Wha!?

Newgrounds, grace me with a new mac and copy of logic? plz!