Rhythm and Time Signatures

Rhythm is math in time. A 4/4 time signature means four quarter-note beats per measure. Polyrhythms — like 3 against 4 — layer different subdivisions simultaneously, creating complex, interlocking patterns. West African drumming traditions are masterclasses in rhythmic mathematics.

Even the emotional impact of music can be partially described mathematically. Tension builds when harmonies drift from simple ratios and resolves when they return. Composers manipulate expectation and surprise through deliberate mathematical choices, whether they think of it that way or not.