How to practise polyrhythms

Published September 22, 2026 · By Jung Byung Su

Two pulses, one bar

A polyrhythm is two different numbers of evenly spaced notes sharing the same span of time. Three notes in one hand against two in the other is 3:2; four against three is 4:3. Both parts start together on the downbeat and then fall on different points until they meet again at the next bar.

Pianists meet this in Chopin and Debussy, where right-hand triplets sit over left-hand eighths. Drummers meet it whenever hands and feet carry different pulses. It is basic material in West African and Afro-Cuban music, and a close relative, the hemiola, is how a 3/4 waltz can momentarily sound like it is in 2, or how "America" from West Side Story alternates between 6/8 and 3/4.

Why counting both parts fails

The instinct is to count three in one hand and two in the other at the same time. Almost nobody can do that at first; one part gets absorbed by the other and you end up playing something like a swung pattern or two evenly spaced groups that do not line up.

The fix is to find the smallest grid that holds both parts. For 3:2 that is six equal slots, because six divides by both three and two. Number them 1 to 6. The three-part lands on 1, 3 and 5. The two-part lands on 1 and 4. Put them together and you get notes on 1, 3, 4 and 5, which is the composite rhythm, and the composite is the thing you actually practise.

4:3 works the same way on a twelve-slot grid. The four-part falls on 1, 4, 7 and 10; the three-part on 1, 5 and 9. Many players use a spoken phrase to learn the shape: "pass the golden butter" fits the 4:3 composite, and "not difficult" fits 3:2.

Grid positions for common polyrhythms
Polyrhythm	Grid size	Part A	Part B	Composite
3:2	6	1, 3, 5	1, 4	1, 3, 4, 5
4:3	12	1, 4, 7, 10	1, 5, 9	1, 4, 5, 7, 9, 10

Programming the composite as a click

Six and twelve are exactly the beat counts of 6/8 and 12/8, so each slot in the grid can become one beat of the metronome. Mute the beats that are not in the composite and the click plays the polyrhythm for you.

For 3:2, choose 6/8 and mute beats 2 and 6 in the accent editor. Leave beat 1 strong to mark where the two parts meet. For 4:3, choose 12/8 and mute beats 2, 3, 6, 8, 11 and 12, which leaves 1, 4, 5, 7, 9 and 10 sounding.

Keep the tempo low. This metronome counts BPM in quarter notes, so eighth-note clicks arrive twice as fast as the number suggests. Somewhere between 60 and 80 is a sensible place to start.

A four-stage routine

Stage 1: count the full grid

With no beats muted, count the slot numbers out loud along with the click until the grid feels steady. Everything that follows depends on this count staying even.

Stage 2: one part at a time

Keep counting and tap only part A with one hand, then only part B with the other. Tap on your legs or a table rather than your instrument, so that technique does not get in the way of timing.

Stage 3: both hands over the composite click

Switch to the muted composite setting and tap both parts together. The sound of your two hands combined should match the click exactly. If one hand hesitates at the off-set notes, drop the tempo by ten; after three clean passes, raise it by five.

Stage 4: take the click away

Finally, mute everything except beat 1 so the click only marks the point where the parts meet. If your hands keep interlocking with only that reference, the polyrhythm has moved from arithmetic into your body. Then move it onto the instrument.

From composite to independence

Learning through the composite is the fastest route in, but in music you need to hear both parts as their own lines. Once the pattern is secure, keep playing it and shift your attention from one hand to the other. Feel the three-part as the beat and the two-part seems to drag across it; feel the two-part as the beat and the three-part seems to push ahead.

When you can flip between those two perceptions at will, polyrhythms stop being a puzzle to solve and become a texture you can hear, whether it is a triplet accompaniment under a straight melody or a drum fill grouped in threes across a 4/4 bar.