is this possible?

Just wondering if a couple of things are possible im os jjos3 ive imported about 40 chops into the mpc from external software. can i timestretch all my peices in batch or pitchshift them because it would take me ages to do them all to find i didnt like the sound and sometimes its quite awkward trying to know which ones youve done or not just want to know to speed things up abit.I could do them in a program before i put them in the machine but i like to decide when they are in the machine so i can decide on tempo and stuff

thanks