The tresillo is a one-bar 3+3+2 rhythm that loops the first half of son clave and recurs across many genres

The tresillo distributes three accents across eight subdivisions with gaps of 3, 3, and 2 — a long-long-short (3:3:2) division within a single bar. It arises by taking the three-hit half of son clave and repeating it inside one bar, which makes it more compact and pervasive than full clave. Rooted in African and Afro-Cuban music and absorbed into early jazz, it spread into R&B, rock, funk, soul, pop, and contemporary electronic music, and is often considered the basic unit of much popular rhythmic feeling. Alone it has limited use, but set against a symmetrical pattern it creates cross-rhythmic tension. It applies equally to kick drums, basslines, chords, and melodies. Common variations: skip the middle accent; extend the ‘3’ groupings before the resynchronising ‘2’; or place the accents in different octaves or on different instruments.

Examples

Step pattern x..x..x. — hits at positions 1, 4, 7 of 8 sixteenths (accents on beat 1, the and-of-2, and beat 4). Euclidean equivalent E(3,8): s("bd(3,8)") in Strudel. Heard in the bassline of ‘Stand By Me’, the riff in Coldplay’s ‘Clocks’, and Ed Sheeran’s ‘Shape of You’; an extended-‘3’ variant appears in Disclosure’s ‘Tenderly’.

Assessment

Given x..x..x., explain the 3:3:2 subdivision and its relation to son clave, and name three songs that use it. Then program it as a kick against a symmetrical hi-hat, identify the cross-rhythmic tension, and extend one ‘3’ grouping to hear how the resynchronisation changes character.