About the A flat Diminished Half-Whole scale
A flat Diminished Half-Whole is used for jazz improvisation over dominant seventh chords. Think of it as the diminished scale starting with a half step, tailor made for dominant chords.
Its notes are A♭, A, C♭, C, D, E♭, F, and G♭. The formula is H W H W H W H W. It is the second mode of G♭ Diminished.
Also called Symmetric Diminished and Dominant Diminished.
The black keys A♭, E♭, and G♭ belong to the scale. Even so, the raised fourth is the white key D. Ascending through this scale, four white keys fall in a row.
Notes and intervals
| 1 | AbA♭ | Root |
|---|---|---|
| 2 | AA | Minor 2nd |
| 3 | CbC♭ | Minor 3rd |
| 4 | CC | Major 3rd |
| 5 | DD | Augmented 4th |
| 6 | EbE♭ | Perfect 5th |
| 7 | FF | Major 6th |
| 8 | GbG♭ | Minor 7th |
| Steps | H W H W H W H W |
|---|---|
| Semitones | 1-2-1-2-1-2-1-2 |
| Degrees | 1 ♭2 ♭3 3 ♯4 5 6 ♭7 |
Shapes
Chromatic
Circle of Fifths
Related scales
Diminished Half-Whole in other keys
C Diminished Half-Whole scaleD flat Diminished Half-Whole scaleD Diminished Half-Whole scaleE flat Diminished Half-Whole scaleE Diminished Half-Whole scaleF Diminished Half-Whole scaleG flat Diminished Half-Whole scaleG Diminished Half-Whole scaleA Diminished Half-Whole scaleB flat Diminished Half-Whole scaleB Diminished Half-Whole scale
Modes
The same notes, starting on a different note.
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