As a hobbyist, you'll know no limits to the sounds offered by the Xtomp. As a performer, you'll need to designate your pedal with that sound effect that turns you on. You can add more Xtomp pedals if you feel compelled to make expanded use of the sounds offered in the Xtomp library. That is to say, changing effects on the fly is cumbersome . This process is app dependent. That said, hats off to the developers. Well worth the investment! Coolest pedal I've ever owned.