Polyrhythm & Odd Meters
Two rhythms at once, or a beat count that refuses to split evenly — the edge cases that make rhythm endlessly interesting.
Polyrhythm: two grids at once
A polyrhythm layers two different, evenly-spaced groupings over the same span of time. The classic example is 3 against 2: one layer plays 3 evenly-spaced notes while another plays 2, both starting and ending together but never quite lining up in between. Layer them and you get a rich, cross-cutting texture that's a staple in African, Latin, and progressive rock drumming.
Odd meters: uneven groupings
Most music sits in simple or compound meter, but odd meters like 5/4 or 7/8 have beat counts that don't split evenly into familiar 2s or 3s. Musicians handle this by breaking the total into smaller chunks — 5/4 as 3+2, 7/8 as 2+2+3 — giving the meter a distinctive limp or lurch instead of a smooth, even pulse.
Common questions
What is a polyrhythm?
Two different, evenly-spaced groupings played at once over the same span of time.
What does "3 against 2" mean?
One layer plays 3 evenly-spaced notes, another plays 2, in the same time span, aligning only at the ends.
What is an odd meter?
A time signature that doesn't split evenly into familiar 2s or 3s, like 5/4 or 7/8.
How do musicians count 5/4 or 7/8?
By splitting the total into smaller chunks, like 3+2 for 5/4 or 2+2+3 for 7/8.
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