As a challenge, perhaps jokingly, a friend suggested that I try a remix of Carmina Burana.

This is a wonderful piece of music, but not a trivial one to work with as (a) it changes key, and (b) it often changes tempo ... not to mention having a wide range of moods and tonality.

Here is the first draft (and very much still a work in progress) of three of the movements. The main elements of Carmina were extracted using Native Instruments Traktor, with additional voices  from the Komplete library played in on an AKAI MPK225 and a Native Instruments Komplete S62.