
''We sped up these recordings exponentially until the tempo of the song became a pitched frequency. This is generally in the area of 480 times faster than normal playback speed. Then we take these short sounds use them as samples to play back midi files of various Guns N' Roses songs. In this way, we can make Guns and Roses songs that are made up of very small Guns N' Roses songs, which could reveal themselves under a sonic microscope, yet are too fast to hear in the actual final product.''
http://www.selfsimilargnr.com/