Half-Whole Diminished

The eight-note symmetric scale, from every V7 root

From any V7 root, alternate half-step → whole-step eight times: H – W – H – W – H – W – H – W. The eight notes of the scale spell out the V7 chord (1, 3, 5, ♭7) plus three altered tensions (♭9, ♯9, ♯11) and the natural 13 — but not the ♭13/♯5. The scale is symmetric — it repeats every minor 3rd, so there are only three unique half-whole scales in all twelve keys (related by minor 3rds).

Used wherever you want a V7 to strain before resolution. McCoy Tyner, Herbie Hancock, Michael Brecker, Eric Dolphy. The symmetry of the scale gives you a self-contained vocabulary that doesn't sound like "running scales."

Now 2 octaves, both hands — the same pattern extended up and back with fingering marked above every note in each hand.

Pattern

H – W – H – W – H – W – H – W (eight notes / octave)

Over V7

1, ♭9, ♯9, 3, ♯11, 5, 13, ♭7 — the ♭9/♯9/♯11 plus a natural 13

G7 (V of C)

C7 (V of F)

F7 (V of B♭)

B♭7 (V of E♭)

E♭7 (V of A♭)

A♭7 (V of D♭)

D♭7 (V of G♭)

F♯7 (V of B)

B7 (V of E)

E7 (V of A)

A7 (V of D)

D7 (V of G)

The Daily Drill

Find the symmetry

4 minPick one key. Play the scale up and down. Notice the alternating half-whole interval pattern — it never breaks. The hand learns one symmetric shape.
4 minFind the four "sister keys": the scale that starts on G also starts on B♭, D♭, and E (all minor 3rds apart). The same eight pitches, three different roots. That's how thin twelve keys really are.
8 minPlay the half-whole scale over the V chord of a ii–V–I, then resolve to the I major scale on the downbeat. Hear the dissolution of the altered tensions into the diatonic.
4 minImprovise a short phrase using only half-whole notes over a single V7 chord. Stay inside the symmetric scale; let the chord change resolve the tension.

Why only three unique scales

The half-whole pattern repeats every minor 3rd. Starting on G gives the same set of pitches as starting on B♭, D♭, or E — they're all just rotations of the same eight notes. So the twelve V chords above only require three distinct fingerings to cover: one for G/B♭/D♭/E, one for A♭/B/D/F, one for A/C/E♭/G♭. The symmetry is a practical gift — you learn three patterns and you have all twelve.

Eight notes, alternating intervals. The same shape, four positions, every altered V7 in the world.

80 bpm

Sound