I have never had that problem before, maybe you should think about chopping in a different way. listen to the music very carefully, during the intro and the outro you might hear something good, that you can keep, then go to a new track and find something else worth keeping, like a clean guitar note, or a bass note, or horn chord, or piano line, listen for loops, and for things that can be played one at a time. You can get the drum sounds from drum fills, and use filters to make them sound like clean, close samples. As you load these samples up, start messing with them and fitting them together. Transpose them so they sound different, try to find a new melody in a solo and put it on the beat, just experiment and ****.