The two tracks Euclidean Patterns Demo 1 & 2 accompany an article on my website about a Java program I wrote that uses a mathematical algorithm to generate polyrhythms known as Euclidean rhythms. The software sends MIDI notes to connected soft- or hardware.

Here’s a short screencap video:
http://www.youtube.com/watch?v=KKbYdExy3jQ ;

And the article on my website:
http://www.hisschemoller.com/2011/euclidean-midi-patterns ;

A bit more on Euclidean rhythms:
http://www.hisschemoller.com/2011/euclidean-rhythms ;