Polyrhythmic Drumming for Metal — Mastodon / Tool Techniques | MetalForge

Learn polyrhythmic metal drumming — 3 against 4, odd meters, and the techniques of Brann Dailor (Mastodon), Danny Carey (Tool), and Tomas Haake (Meshuggah). ...

Frequently Asked Questions

How do I start learning polyrhythm on drums?

Start with 3 against 4 using just your hands — right hand taps three evenly spaced beats while left hand taps four evenly spaced beats over the same duration. The mnemonic "Pass the beer" vs "Cold cup of tea" helps internalize the feeling. Once this feels natural, move to the drum kit and apply one layer at a time. Brann Dailor's Mastodon patterns are excellent study material because the melodic tom content makes the polyrhythm easier to hear.

What is the difference between polyrhythm and odd time signatures?

Odd time signatures (7/8, 5/4, 9/8) place an unusual number of beats in each bar — the entire band plays in the same unusual meter. Polyrhythm is when two or more contrasting rhythms play simultaneously within a single time signature — for example, playing groups of three over a 4/4 pulse. Danny Carey of Tool uses both: "Schism" switches between odd time signatures, while many of his fills use polyrhythmic displacement within those odd meters.

Which Tool song is the best for learning odd time signatures?

"Schism" by Tool is the classic entry point for odd time signatures in metal — it alternates between 5/4 and 7/8 in a way that feels completely natural and musical. "Lateralus" is more complex, built on Fibonacci sequence time signature groups. Danny Carey's drumming on both tracks demonstrates how odd meters can groove just as hard as 4/4 when internalized fully.

Gear Deep Dives & Articles

1. Step 1: Understand 3 Against 4: The Foundation of Polyrhythm — The most fundamental polyrhythm in Western music is three against four — a group of three evenly spaced notes played against a group of four evenly spaced notes over the same duration. To feel this, try the "Pass the beer" / "Cold cup of tea" mnemonic: "Pass the beer" (3 syllables) against "Cold cup of tea" (4 syllables). The two phrases take the same total time but subdivide it differently, creating a cross-rhythm. On the drum kit: with your right hand, play three evenly spaced strokes per measure of 4/4. With your left hand, play four evenly spaced strokes (the standard quarter notes). Where the two hands align (beat one) and where they diverge is the essence of polyrhythm. Brann Dailor (Mastodon) uses this 3:4 relationship constantly in his tom fills — rather than playing a standard 16th-note roll, he displaces the accent every three 16th notes, creating a rotating accent pattern over the standard 4/4 pulse. Practice this at 60 BPM until both layers feel natural simultaneously.
2. Step 2: Learn Odd Time Signatures: 5/4, 7/8, and 9/8 — Odd time signatures create the rhythmic tension that characterizes progressive metal. Danny Carey's "Schism" by Tool alternates between 5/4 and 7/8, creating an unsettled, propulsive feel that somehow still grooves. To learn 5/4: count "1-2-3-4-5" with a strong accent on 1 and a secondary accent on 3 (grouping 3+2) or on 4 (grouping 2+3). Tool's "Schism" uses 5/4 as 2+3. For 7/8: group the eight subdivisions as 2+2+3 or 3+2+2. "Lateralus" by Tool is famously built on the Fibonacci sequence (1,1,2,3,5,8,13) in both the syllables of the lyrics and the time signature patterns. Tomas Haake of Meshuggah operates in a fundamentally different framework — he plays patterns that feel like odd time signatures but are actually long repeating accent patterns over 4/4. His signature approach on "Bleed" uses a 17/16 pattern cycling against a 4/4 backdrop. Study the polyrhythms technique page at /technique/polyrhythms for additional examples and a roster of polyrhythmic metal masters.
3. Step 3: Study the Brann Dailor Approach: Melodic Polyrhythm — Brann Dailor of Mastodon approaches polyrhythm melodically — his fills tell stories through pitch as much as rhythm. His tom tuning is deliberately musical (specific intervals between drums) and his rhythmic displacement creates implied melodies. On "Blood and Thunder" (Mastodon, Leviathan, 2004), Dailor's intro pattern superimposes a three-beat accent cycle over the standard 4/4 groove — the accent falls on the 1, then the 4-and, then the 3, then the 2, continuously cycling. To practice Dailor-style polyrhythm: tune your toms to specific pitches (not just "high," "medium," "low" — but actual musical intervals like a perfect fourth or fifth between each drum). Then play a 3-note tom pattern that repeats every three 16th notes, displacing the accent across a 4/4 bar. It will take four full bars for the pattern to return to the downbeat, creating a 4-bar phrase from a 3-note pattern. This is Mastodon's rhythmic secret. Visit Brann Dailor's profile at /drummer/brann-dailor for his complete gear setup and drum kit configuration.
4. Step 4: Study the Danny Carey Approach: Sacred Geometry and Odd Meters — Danny Carey of Tool draws on sacred geometry, Eastern rhythmic concepts, and polyrhythmic theory to create some of the most sophisticated drum compositions in rock music. His approach on "Lateralus" (2001) uses bar groupings of 9/8, 8/8, and 7/8 in sequence — 9+8+7 = 24, which then repeats. The feeling is of constant rhythmic motion without a predictable downbeat, while remaining completely intentional. "Pneuma" from Fear Inoculum (2019) opens with a polyrhythmic drum intro that cycles through multiple layered patterns before the full band enters. To learn Carey-style patterns: start by learning to feel 9/8 as 2+2+2+3 (as in many Turkish folk rhythms). Then practice shifting between 9/8 and 8/8 without losing your place in the phrase. Add a pedal pattern beneath these shifting meters. Carey's kit is configured with multiple hi-hats and electronic pads to allow additional polyrhythmic layers that a standard kit cannot produce. His complete gear setup is at /drummer/danny-carey.
5. Step 5: Apply Tomas Haake's Djent Polyrhythm: Groups Over 4/4 — Tomas Haake of Meshuggah created the djent style — a highly specific approach to polyrhythm that operates entirely within 4/4 while creating the impression of multiple competing meters. The technique: take a short rhythmic motif (say, 5 or 7 16th notes) and repeat it continuously over a standard 4/4 hi-hat pulse. Because 5 does not divide evenly into 4, the accent of the motif shifts with every repetition, cycling back to the downbeat only after several bars. "Bleed" by Meshuggah uses a 17/16 kick pattern cycling against 4/4 — the result is nearly 17 bars before the kick pattern returns to beat one. This approach creates rhythmic tension that feels like constantly shifting time signatures while actually being metrically simpler than it sounds. Practice by choosing a 5-note kick pattern (e.g., 16th notes: K-K-rest-K-K where rest is 1 16th note of silence) and looping it continuously while your hands play straight 4/4. Record yourself and listen back — the shifting accents against the steady hand pulse is the core of the djent sound. See Tomas Haake's complete gear at /drummer/tomas-haake and the polyrhythms technique page at /technique/polyrhythms.
Brann Dailor — Complete Gear Setup
Danny Carey — Complete Gear Setup
Tomas Haake — Complete Gear Setup

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