Sus Chord Vamp

V7sus as m7-over-bass hybrid, twelve keys

A V7sus chord doesn't pull to resolve — it replaces the leading-tone 3rd with a 4th, removing the dominant's tendency to land on I. The chord becomes static, ready to vamp for as long as you want. Herbie Hancock built whole tunes on V7sus vamps (Maiden Voyage, Cantaloupe Island).

The standard piano voicing is the hybrid / slash chord: take the m7 chord rooted on the 5 of V, and play it over the V's root in the bass. For G7sus the upper structure is Dm7 (the m7 chord on G's 5). Together: Dm7/G. The four notes of the upper m7 spell out 5-♭7-9-11 of the V chord — exactly what a 9sus4 (a V11) wants on top of its root.

Formula

V7sus = m7-chord-on-the-5 / V-root

Upper m7 notes

= 5, ♭7, 9, 11 of the V chord — sus chord with extensions

G7sus (Dm7/G)

C7sus (Gm7/C)

F7sus (Cm7/F)

B♭7sus (Fm7/B♭)

E♭7sus (B♭m7/E♭)

A♭7sus (E♭m7/A♭)

D♭7sus (A♭m7/D♭)

F♯7sus (C♯m7/F♯)

B7sus (F♯m7/B)

E7sus (Bm7/E)

A7sus (Em7/A)

D7sus (Am7/D)

The Daily Drill

Sit on the chord

3 minPlay the voicing in one key. Don't resolve it. Hold it for sixteen bars. Notice how the chord doesn't need to go anywhere — that's the sus quality.
8 minCycle three keys at a time. The chord shape is identical (LH=root, RH=m7); only the transposition changes.
3 minResolve manually: hold sus for 7 bars, then drop the upper m7's ♭7 a half-step to release the suspension. For Dm7/G the move is C → B: the C is the suspended 4 of G7, and B is the 3 it wants to land on. Every other voice can hold (D = 5 of G7, F = ♭7, A = 9). Hear the sus dissolve into the dominant in a single half-step.
3 minApply to a tune: play Maiden Voyage's first bar with this V7sus voicing. Then move chromatically to the next bar's V7sus. The whole tune is built on this voicing in different keys.

Why m7-over-root works

The m7 chord (1-♭3-5-♭7) rooted on the 5 of a dominant V7 chord generates the notes 5-♭7-9-11 of V. The 4 (= 11) replaces the 3 — that's the sus. The ♭3 of the upper m7 is the ♭7 of V — the dominant's defining tension. The 5 of the upper m7 is the 9 of V — colour. The result is a V11 chord (a 9sus4), expressed as a familiar m7 shape that any pianist's hand already knows. Two voicings for the price of one.

No leading tone, no resolution. The dominant, suspended forever.

80 bpm

Sound