"Iraqi 6" by Saadoun Al-Bayati
This piece is just awesome. It consists of various hand percussion patterns that basically never repeat, shift meter and tempo like it's their job, and are each intricate and interesting in their own right. Like the best Middle Eastern music, the tune has a droning effect--despite the frantic, kinetic, non-repeating nature of the percussion. While it's sparse, it's anything but simple. They should've declared war on us for having collectively subpar composition abilities.