FreeCycle: Plastic surgery for your audio... :-) 
http://freecycle.redsteamrecords.com/


Its a program that does all sorts of funky DSP analysis, and then spits out .wav's for each "chunk" of beat.
Its even kind enough to also export a MIDI file that will play back that same loop if you load the samples to
the right pads.. ;-)

Lots of nice features, I've had great fun messing with loops & that prog.. hope its of any use to you!
Cheers, -Harry