Polyrhythm is the superimposition of two or more independent rhythms that divide time differently. The classic example is “three against two” (one hand plays triplets, the other duplets), creating a characteristic shimmering, “rolling” feel.
The richest and most ancient tradition of polyrhythm is African drumming, where several performers weave independent rhythmic lines into a complex, living fabric. In the 20th century polyrhythm was actively taken up by art music, as well as jazz, progressive rock, and electronica. Polyrhythm stands opposed to a simple “marching” pulse: it creates layering, inner tension, and the energy of motion. It is one of the most powerful resources of rhythmic expression, making music more complex and more captivating.
