Go to the program page...select the program...hit the pad you want to fix...hit KG mix....Hit edit 1....curssor down to the bottom right of the screen....set the sustain amount to 0....then play with the decay amount until the pop goes away. That will get rid of pops at the end. Play with the attack amount to get rid of pop/click at the begining, but be careful, the sample will loose some punch if you mess with the attack.