Hi guy's! I want to buy JamVOX in near future for my Macbook pro (last mac os version). On backside of JamVOX i see a expression pedal, footswitch ports, they will work in garageband bilt-in effects like wah-wah and others? And how do you assess the overall quality of sound? I want to use Jamvox only with Mac and Garageband! Thanks!