After just a short time with my MPC, I've found the 16 levels function to be absolutely amazing. Especially when composing melodies. Sometimes I use it on drums too, but I've found it xtra helpful with a tone sample of some kind--the 16 levels expands your horn blast or piano hit or bass drum or whatevs to a full key (12 different tones), spread over the pads from the starting point of your choice. You can choose which pad the original tone is assigned to, from 4 to 13 I think. This is a rudimentary step in getting more out of less (I'm new to samplers, obviously!).
16 levels gives you not only 12 different tones from your starting source, but you can select other 16-step options, like velocity, decay, etc. etc. Brilliant stuff, probably in my top 5 "helpful tools when composing on the MPC" list. Anyone care to list out their top 5 helpful features when composing?
Ben