There is a really interesting article HERE about the complexities of West African music, esp. Ghanaian, written by a prof. at UC Irvine. Well worth reading, imo. Here's the first bit:
Anyone with a passing knowledge of African drumming knows how complex the rhythms are. However when you literally sit in the middle of a group of traditional drummers and musicians while they interact with the dancers who lead the music, the level of complexity moves into quantum dimensions. It's as if the group is a giant atom, with the the musicians moving at sometimes blinding speed like electrons around the nucleus of the master drummer and and clave (or bell) players. Like a musical embodiment of the Heisenberg principle, it's often impossible to know precisely where the individual musicians are in the beat (although they do), as they constantly engage in micro-shifts of their rhythms in response to each other and the dancers.