2:3 polyrhythm

What it means

A 2:3 polyrhythm means two evenly spaced notes happen in the same amount of time as three evenly spaced notes. It is often called two against three.

The ratio matters: 2:3 names the two-note layer first and the three-note layer second. In practice, that usually means you are feeling or playing a steady group of three while another part places two equal notes across the same span.

Both layers share the same start point and meet again at the end of the cycle. The tension comes from the middle notes not lining up.

How the layers line up

The easiest way to see 2:3 is to divide the shared time span into six equal slots. Six works because both 2 and 3 fit evenly inside it.

Both layers hit together on slot 1. The 3-note layer also hits on slots 3 and 5. The 2-note layer also hits on slot 4. They resolve together at the next slot 1, which is the start of the next cycle.

If one full 2:3 cycle lasts one quarter note, the six slots are sextuplet positions. The 3-note layer is an eighth-note triplet, and the 2-note layer is two even eighth notes across the same quarter-note span.

If the whole pattern fits inside one beat, it resolves on the next beat. If it fits inside one bar, it resolves on the next bar. The ratio tells you the spacing relationship; the music tells you the actual duration.

How to count or clap it

Start with a six-count grid:

1 2 3 4 5 6

Clap the 3-note layer on:

1 3 5

Then clap the 2-note layer on:

1 4

To put the full 2:3 relationship together, tap the 3-note layer with one hand and the 2-note layer with the other:

• Right hand: 1 3 5
• Left hand: 1 4

A useful spoken phrase is:

Together, three, two, three

On the six-slot grid, that means both hands on 1, the 3-layer on 3, the 2-layer on 4, and the 3-layer on 5. Then the pattern resolves at the next 1.

How it feels

2:3 can feel like a wide, spacious two-note shape floating across a quicker three-note pulse. The two-note layer may feel stretched, while the three-note layer may feel more active or rolling.

For example, if a metronome click marks the start of each cycle and you count three equal pulses inside it, the 2-note layer lands on the beginning and then halfway through that three-pulse span. That halfway point does not match one of the three pulses, which creates the characteristic push-pull.

The goal is not to rush one layer until it lines up. The goal is to keep both layers even and let the temporary disagreement be heard clearly.

Where musicians use it

Musicians use 2:3 polyrhythm in drumming, piano, guitar, bass, vocals, composition, and production. A drummer might keep a triplet-based cymbal or hand pattern while placing two bass drum notes evenly across the same space. A pianist might play three notes in one hand and two in the other. A producer might layer a two-step synth accent over a three-note percussion loop.

Two-against-three relationships appear in many traditions, including African diasporic musics, jazz, classical music, progressive rock, metal, electronic music, and film scoring. The exact feel, role, and phrasing vary by style and ensemble, so the ratio should be treated as a timing relationship rather than a complete description of a tradition.

Common confusions

2:3 polyrhythm vs 3:2 polyrhythm: These describe the same basic relationship from opposite viewpoints. In this article, 2:3 means the two-note layer is being compared against the three-note layer. In a 3:2 article, the focus is usually three evenly spaced notes against two.

Polyrhythm vs polymeter: A polyrhythm layers different subdivisions inside the same shared cycle. A polymeter layers different meters or bar lengths at the same tempo, such as one part in 3/4 against another in 4/4. In 2:3 polyrhythm, the parts usually resolve together after the shared span.

Polyrhythm vs triplets: Triplets alone are not automatically a polyrhythm. A polyrhythm happens when another layer, such as two evenly spaced notes, is heard against the three-note subdivision.

2:3 vs hemiola: Hemiola often creates a temporary shift between feeling three groups of two and two groups of three. 2:3 is the direct simultaneous layering of two evenly spaced notes against three evenly spaced notes.

Practice with a metronome

1. Set the metronome to a slow tempo, such as 60 bpm. Let each click mark the start of one full 2:3 cycle.
2. Count six equal slots between clicks: 1 2 3 4 5 6.
3. Clap the 3-note layer on 1 3 5 until it feels even.
4. Clap the 2-note layer on 1 4 until it feels even.
5. Tap the 3-note layer with your right hand and the 2-note layer with your left hand. Both hands should meet on the click.
6. Switch hands so the 2-note layer is in the right hand and the 3-note layer is in the left hand.
7. For a harder variation, set the click to every other cycle. Keep the full pattern steady and check whether both layers still resolve cleanly with the click.