Quartal voicings stack perfect fourths instead of thirds — the harmonic language of McCoy Tyner, Herbie Hancock's modal period, and countless post-bop pianists. On jazz piano, quartal stacks produce open, ambiguous sonorities that float over modal centers and modern standards without locking into traditional root-third-fifth spelling.
This guide builds quartal voicings from the ground up, applies them on Dm7 and dominant chords, and connects to repertoire like So What.
Thirds vs. Fourths: Why Quartal Harmony?
Traditional tertian chords stack thirds: Cmaj7 = C–E–G–B. Quartal stacks use fourths: C–F–B–E (with spelling adjustments). Fourths avoid spelling a clear major or minor triad in the bottom — listeners hear color and tension rather than immediate functional pull.
On modal tunes with long Dm7 or sus4 sections, quartal voicings match the static harmony. On functional progressions, they add modern reharmonization color when inserted on ii or V chords.
Building a Basic Quartal Stack
From D, ascend in perfect fourths:
D – G – C – F – Bb
Play D3, G3, C4, F4, Bb4 with the right hand; optionally add D2 in the left for bass reinforcement in solo piano.
This voicing implies D Dorian / Dm11 without stating a minor third in the bass cluster — the F and Bb add 7th and 11th color.
Quartal Voicings on Dm7 / D Dorian
Three movable shapes (note names):
- Shape A: D, G, C, F, A (add 6th on top for Dorian)
- Shape B: E, A, D, G, C (second inversion stack)
- Shape C: F, Bb, Eb, Ab, Db — use as passing quartal color; enharmonic carefully
Practice sliding Shape A up whole steps: D stack → E stack → F# stack while pedaling — horizontal modal movement on So What-style harmony.
Repertoire application: So What modal comping in D Dorian.
Quartal Voicings on Dominant Chords
G7 quartal options:
- G – C – F – Bb — sus4 leaning, less Bebop resolution
- B – E – A – D over G bass — upper structure quartal on 3rd of G7
- F – Bb – Eb – Ab — tritone-sub quartal color approaching Cmaj7
On a ii–V–I in C (Dm7–G7–Cmaj7), use quartal voicings on Dm7 and G7, then tertian Cmaj7 for resolution contrast — or quartal Cmaj7 (E–A–D–G) for uniform texture.
McCoy Tyner Style: Parallel Quartal Motion
Tyner often moves identical quartal hand shapes up and down the keyboard in parallel — especially on minor and Phrygian colors. From D quartal stack, shift the same shape up a minor third to F quartal stack for dramatic modal shift.
Rhythmic approach: repeated staccato hits on beats 1 and 3, same voicing shifted every two bars. Works on modal vamps and on Coltrane changes at slow tempos.
Bill Evans Style: Quartal Upper Structures
Evans mixed tertian left hand with quartal right-hand extensions. Example on Cmaj7:
Left: C2, G2 | Right quartal: E3, A3, D4, G4
The right hand quartal stack (built on E) suggests Cmaj9#11 without dense cluster. Lighter than full quartal solo-piano approach.
Combining with Tensions
Quartal stacks naturally produce extensions:
- Stack from chord 5th often yields 9, #11, or 13 depending on starting note
- On Cmaj7, quartal from E: E–A–D–G = 3, 13, 9, 5 — lush major sound
- On Dm7, quartal from F: F–Bb–Eb–Ab — minor 11 and color tones
Tension reference: jazz chord tensions.
Voice Leading Between Quartal Voicings
Avoid jumping randomly. Common moves:
- Whole step: D stack → E stack (So What section change without functional V)
- Half step: D stack → Eb stack (Eb Dorian modal shift)
- Common tone: Keep C in top voice while lower notes revoice from Dm quartal to G7 quartal
Practice slow comping: eight bars D quartal, eight bars Eb quartal, return — match So What form.
Quartal vs. Rootless Tertian Voicings
| Approach | Best for | Character |
|---|---|---|
| Quartal | Modal, post-bop, McCoy-style | Open, ambiguous, powerful |
| Rootless tertian | Standards, bebop, swing | Functional, guide-tone clear |
Many pianists use tertian on standards and quartal on modal tunes — but mixing quartal on ii chords of a blues in F (Gm7 quartal stack: G–C–F–Bb) modernizes traditional comping instantly.
Left-Hand Considerations
Full quartal solo piano: left hand plays bass note (root or fifth) plus lower fourth — e.g., D2 and G2 under right-hand quartal stack. Do not double too many notes in low register — muddiness below C3.
With bassist: omit roots; comp quartal stacks C4 and above. See jazz piano left-hand voicings.
Practice Exercises
- Build quartal stacks from every note of D Dorian; 2 minutes.
- Comp 32 bars So What form with quartal voicings only.
- On ii–V–I in C, use quartal on Dm7 and G7, tertian on Cmaj7 — 80 BPM.
- Parallel minor-third shifts: D stack → F stack → Ab stack — rhythmic repeated hits.
- Transpose quartal comping to Eb Dorian and G Dorian.
Voicing Density and Register on Solo Piano
Solo quartal comping can overwhelm listeners if every bar uses five-note stacks in the same register. Alternate sparse two-note fourths (D–G in right hand) with full stacks at phrase peaks. Drop below C3 only for intentional bass emphasis — modal tunes still need clarity, not rumble.
When transitioning from quartal modal comping back to tertian standards on the same gig, spend five minutes rewarming rootless ii–V shapes so your hands do not default to quartal grips on functional dominants.
Quartal Inversions on the Cycle
Practice quartal stacks starting on each degree of D Dorian: D, E, F, G, A, B, C. Each starting note produces a different extension emphasis over Dm7. Spend two minutes per starting pitch over a static vamp — builds horizontal vocabulary beyond the single "So What voicing" cliché.
Hand Stretch and Voicing Range
Five-note quartal stacks exceed some players' comfortable reach above C4. Split the stack across hands: left plays D3–G3, right plays C4–F4–Bb4. Same pitch set, less strain. Document which splits work at ff versus pp — dynamic control suffers when hand position fights extension limits.
Review turnaround shells in three keys before every gig — muscle memory fades faster on endings than on heads.
Summary
- Quartal voicings stack perfect fourths for open, modal-friendly harmony.
- D Dorian stacks (D–G–C–F) suit tunes like So What.
- McCoy Tyner uses parallel quartal motion; Evans blends quartal tops with tertian bass.
- Apply on ii, V, and modal centers; mix with tertian voicings for contrast.
- Keep low register sparse; comp above C4 when a bassist plays roots.
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