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Gavin Harrison

Porcupine Tree · Rhythmic illusion and groove displacement

The hardest material in Gavin Harrison's system — late-path stages and the toughest song studies. Same underlying workouts as everywhere else, nothing duplicated.

Late-path stages

Stage 8

Advanced song studies: composed parts

Learn a fully composed drum part note-for-note, as Harrison writes his parts out.

Workout

Stage 9

Signature performances: rhythmic illusion suite

String displacement, odd groupings and metric modulation together in one long passage.

Workout

Stage 10

Mastery: The Incident suite

Endurance and control across a long-form composed piece with constant shifting textures.

Workout

Toughest song studies

Arriving Somewhere But Not Here

Porcupine Tree · Deadwing

Level 4

≈ 92 · 4/4

Prep with: Stage 3Signature techniques: snare displacement

Primary technique:
Snare displacement
Also trains:
Rhythmic illusion, Dynamic build
Key groove:
Slowly displaced backbeat that gradually resolves into a driving straight groove.
Signature fill:
Long build fill across toms leading into the heavy final section.
Transition:
Extended crescendo from ambient intro to full-band climax.
Listen for:
Where exactly the snare 'settles' onto the true backbeat.
Training:
Trains snare displacement and long-form dynamic patience.
Challenge:
Extend the displaced section by four extra bars before resolving.
  • Intro: Ambient, near-silent cymbal swells.
  • Verse: Displaced snare hits create rhythmic ambiguity.
  • Build: Tom-driven crescendo gains density.
  • Climax: Full straight backbeat, maximum drive.
Workout

The Sound of Muzak

Porcupine Tree · In Absentia

Level 4

≈ 84 · 4/4 (with 7-groupings)

Prep with: Stage 3Signature techniques: snare displacement

Primary technique:
Odd groupings over 4/4
Also trains:
Rhythmic illusion, Ghost notes
Key groove:
A groove built from 7-note groupings layered smoothly over a straight verse pulse.
Signature fill:
Grouping-based fill that resolves exactly on beat one.
Transition:
Groove shifts grouping size between verse and chorus.
Listen for:
The moment the 7-grouping realigns with the downbeat.
Training:
Core rhythmic-illusion training for odd groupings inside straight time.
Challenge:
Switch from 7s to 5s mid-phrase without a click.
  • Verse: 7-grouping pattern disguised as straight time.
  • Chorus: Groove simplifies to a driving 4/4 backbeat.
  • Instrumental: Groupings return, more exposed.
  • Outro: Resolves cleanly to straight time.
Workout

Anesthetize

Porcupine Tree · Fear of a Blank Planet

Level 5

≈ 138 · 4/4

Prep with: Stage 3Signature techniques: snare displacement

Primary technique:
Linear grooves
Also trains:
Odd groupings, Metric modulation, Dynamic build
Key groove:
Extended linear passages weaving kick, snare and hats without overlap.
Signature fill:
Multi-bar linear fill spanning the whole kit during the instrumental section.
Transition:
Long instrumental section shifts through several linear and odd-grouping ideas.
Listen for:
The rolling, non-overlapping feel of the linear sections.
Training:
Builds stamina and vocabulary across an extended, multi-section piece.
Challenge:
Play the full instrumental section from memory, start to finish.
  • Intro: Sparse, atmospheric, minimal kit.
  • Verse: Straightforward rock groove.
  • Instrumental: Linear grooves and odd groupings combine.
  • Climax: Full-kit intensity with layered fills.
  • Outro: Returns to ambient calm.
Workout

The Creator Has a Mastertape

Porcupine Tree · Fear of a Blank Planet

Level 5

≈ 150 · 4/4

Prep with: Stage 3Signature techniques: snare displacement

Primary technique:
Metric modulation
Also trains:
Odd groupings, Linear fills
Key groove:
Aggressive groove that briefly implies a different tempo before snapping back.
Signature fill:
Modulated fill that resolves into a double-time chorus.
Transition:
Tempo-illusion section leading into the explosive final chorus.
Listen for:
The false sense that the tempo has changed when it hasn't.
Training:
Trains metric modulation under high-intensity, fast tempo conditions.
Challenge:
Add a double kick burst inside the modulated section.
  • Intro: Aggressive kick-driven riff support.
  • Verse: Straight groove with tension building.
  • Modulation: Felt tempo shifts without a real tempo change.
  • Chorus: Explosive resolution, full backbeat.
Workout

Sleep Together

Porcupine Tree · In Absentia

Level 4

≈ 100 · 4/4

Prep with: Stage 3Signature techniques: snare displacement

Primary technique:
Composed drum parts
Also trains:
Linear grooves, Snare displacement
Key groove:
A tightly composed groove with programmed-sounding precision, alternating linear ideas.
Signature fill:
Precisely placed fill mimicking a drum-machine pattern.
Transition:
Groove morphs from acoustic feel to programmed-sounding tightness.
Listen for:
The machine-like precision Harrison brings to a human performance.
Training:
Develops the discipline of playing a fully composed part exactly the same way twice.
Challenge:
Play the section with a click and zero timing drift.
  • Intro: Programmed-feel groove enters gradually.
  • Verse: Composed linear pattern, tightly controlled.
  • Chorus: Groove opens up with more backbeat weight.
  • Outro: Fades back to the programmed feel.
Workout

Way Out of Here

Porcupine Tree · Fear of a Blank Planet

Level 5

≈ 92 · 4/4

Prep with: Stage 3Signature techniques: snare displacement

Primary technique:
Rhythmic illusion
Also trains:
Snare displacement, Odd groupings, Dynamic build
Key groove:
Long, patient groove combining displacement and grouping tricks across a slow build.
Signature fill:
Extended illusion passage before the song's climactic instrumental.
Transition:
Gradual dynamic and rhythmic build from ballad to full band intensity.
Listen for:
How many rhythmic tricks are stacked without the groove ever feeling busy.
Training:
Combines displacement, grouping and dynamics in one long passage.
Challenge:
Sustain the full illusion passage for 8 bars without referencing the click.
  • Intro: Gentle ballad groove, brushed dynamics.
  • Verse: Displaced snare enters subtly.
  • Build: Odd groupings layer in as intensity rises.
  • Climax: Full illusion passage at peak volume.
Workout

Harridan

Porcupine Tree · The Incident

Level 4

≈ 128 · 4/4

Prep with: Stage 3Signature techniques: snare displacement

Primary technique:
Linear grooves
Also trains:
Ghost notes, Kick variations
Key groove:
Funky, syncopated linear groove that opens the Incident suite.
Signature fill:
Snappy linear fill punctuating the main riff's stops.
Transition:
Groove tightens into a driving straight section for the chorus.
Listen for:
The syncopation between kick and snare in the main groove.
Training:
Builds linear groove confidence at a moderate rock tempo.
Challenge:
Add ghost notes throughout without disturbing the pocket.
  • Intro: Syncopated linear groove establishes the riff.
  • Verse: Groove locks tightly with the bass.
  • Chorus: Straightens into a driving backbeat.
  • Outro: Returns to the syncopated linear feel.
Workout

Octane Twisted

Porcupine Tree · Closure/Continuation

Level 5

≈ 132 · 4/4

Prep with: Stage 3Signature techniques: snare displacement

Primary technique:
Rhythmic illusion
Also trains:
Metric modulation, Composed drum parts
Key groove:
Modern illusion writing, tighter and more electronic-influenced than earlier records.
Signature fill:
Precisely composed modulating fill into the final chorus.
Transition:
Sudden modulation into a half-time coda.
Listen for:
How the modulation feels inevitable rather than jarring.
Training:
Advanced combination of composed parts and metric modulation.
Challenge:
Play the full modulation into the coda from memory at tempo.
  • Intro: Modern, tight groove with subtle illusion.
  • Verse: Composed part, precise ghost placement.
  • Chorus: Full drive, straightforward backbeat.
  • Coda: Metric modulation into a half-time close.
Workout