5:4 polyrhythm

What it means

A 5:4 polyrhythm means five evenly spaced notes happen in the same amount of time as four evenly spaced notes. The ratio is read as five against four.

The two layers share the same overall cycle length, but they divide that cycle differently. One layer divides the space into 5 equal parts. The other divides it into 4 equal parts. They line up at the start, pull apart in the middle, and resolve together at the next start of the cycle.

How the layers line up

The easiest way to see 5:4 is to use a 20-part grid, because 20 is the smallest number that both 5 and 4 divide evenly.

On a 20-count grid, the 5-note layer lands every 4 counts: 1, 5, 9, 13, 17.

The 4-note layer lands every 5 counts: 1, 6, 11, 16.

Both layers meet on count 1, then separate, then resolve together on the next count 1 after the 20-count cycle.

How to count or clap it

Start by counting a steady 20-count grid out loud:

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

Clap the 5-note layer on:

1, 5, 9, 13, 17

Then clap the 4-note layer on:

1, 6, 11, 16

When each layer feels secure, tap the 4-note layer with your foot and clap the 5-note layer with your hands. The first clap and foot tap happen together. After that, the hand notes fall slightly before or after the foot taps until the cycle comes back around.

If you are in 4/4, a common musical version is to feel four quarter-note beats while playing five evenly spaced notes across the full bar. That is not the same as playing five notes on each beat. It is five notes stretched across the same time as beats 1, 2, 3, and 4.

How it feels

5:4 feels more stretched and floating than 3:2 or 4:3. The 5-note layer does not sit neatly on the usual quarter-note or eighth-note grid, so it can create a smooth, elastic pull across the bar.

In the 20-count example, the second 5-note attack lands on count 5, one small count before the 4-note layer's beat 2 on count 6. The fifth 5-note attack lands on count 17, one small count after the 4-note layer's beat 4 on count 16. Those near-misses are a big part of the sound.

If the 4-note layer is the main pulse, the 5-note layer can feel like it is leaning forward, because several of its attacks arrive a little earlier than many players expect. If the 5-note layer is treated as the main pulse, the 4-note layer can feel broad and heavy underneath it.

The important point is that the tempo does not have to change. The pulse can stay steady while the subdivision layer changes.

Where musicians use it

Musicians use 5:4 polyrhythms in progressive rock, jazz, contemporary classical music, metal, fusion, electronic production, film scoring, and advanced drum set vocabulary. It can appear as a drum fill, a melodic phrase over a steady groove, a synth pattern, or a piano rhythm split between the hands.

Drummers might keep a steady four-beat pulse on the kick or hi-hat while phrasing five strokes across the bar. Pianists and guitarists might play a five-note arpeggio pattern over a four-beat accompaniment. Producers might sequence a five-step accent pattern against a four-beat loop to create motion without changing the tempo.

Common confusions

5:4 polyrhythm is not the same as 5/4 time. In 5/4, the meter has five quarter-note beats per bar. In 5:4, five evenly spaced notes are played against four evenly spaced notes within the same span.

5:4 is not the same as polymeter. In a polyrhythm, the layers share the same cycle length and resolve together. In polymeter, different meters may run at the same time, such as a 5-beat pattern against a 4-beat pattern, and they may only realign after several bars.

5:4 is not just playing fast. The five notes must be evenly spaced across the same duration as the four-note layer. If the spacing is uneven, it becomes a different rhythmic effect.

5:4 is related to quintuplets, and the two ideas can overlap. A quintuplet usually means five equal notes in the space normally occupied by four notes of the same value. A 5:4 polyrhythm focuses on the relationship between a five-part layer and a four-part layer, especially when both layers are heard at the same time.

Practice with a metronome

1. Set the metronome to a moderate grid tempo, such as 80 to 120 BPM. Let each click represent one of the 20 small counts. The main 4-beat pulse will feel very slow at first, and that is normal.
2. Count from 1 to 20 repeatedly. Clap on 1, 5, 9, 13, and 17. This is the 5-note layer.
3. Keep counting and clap on 1, 6, 11, and 16. This is the 4-note layer.
4. Tap your foot on 1, 6, 11, and 16 while clapping 1, 5, 9, 13, and 17.
5. Once the grid feels clear, speed up the grid if needed, then change the metronome so it clicks only the 4 main beats. Clap five evenly spaced notes across those four clicks.
6. For a harder version, set the click to only the downbeat of each cycle. Play the full 5:4 pattern and make sure both layers resolve cleanly with the next click.