polyrhythm

A polyrhythm occurs when two or more conflicting rhythmic patterns are played simultaneously. The simplest polyrhythm, three against two (3:2), creates a lilting, cross-rhythm effect. More complex polyrhythms — like four against three or five against four — create intricate, interlocking rhythmic textures. Polyrhythm is fundamental to African and Afro-Caribbean music, where multiple drum parts interlock to create dense rhythmic tapestries. It entered Western classical music primarily in the 20th century, though Brahms and Chopin both used subtle polyrhythms in their piano writing. Jazz, progressive rock, and electronic dance music all employ polyrhythmic techniques to create rhythmic complexity and groove.