Ab Diminished (half–whole)
An eight-note symmetric half–whole scale; its altered degrees create a tense dominant sound.
Octaves
Musical context
How the scale relates to the chord, mode, key and progression.
Theory
General info
- Name
- Ab Diminished (half–whole)
- Family
- Symmetric scales
- Note count
- 8
- Step formula
- H – W – H – W – H – W – H – W
- Numeric formula
- 0-1-2-1-2-1-2-1-2
Notes & degrees
1Abroot
b2Aminor 2nd
#2Baug 2nd
3Cmajor 3rd
#4Daug 4th
5Ebperfect 5th
6Fmajor 6th
b7Gbminor 7th
Construction
- Overview
- An eight-note symmetric half–whole scale; its altered degrees create a tense dominant sound.
- Application in music
- Symmetric: the half–whole pattern repeats every minor third. Sits over dominant sevenths with b9 and #9 (V7b9).
- Interval formula
- AbHAWBHCWDHEbWFHGb
Tensions & resolutions
Stable degrees
IAbpoint of resttonic
IIICdefines modal qualitythird
VEbsupports the tonic sonorityfifth
Typical resolutions & tensions
IAbAb
IIAA
Scale degree 2 may descend to tonic; the motion is especially close when degree 2 is lowered.
This scale on guitar 🎸
See how Ab Diminished (half–whole) looks on guitar.
Circle of fifths
The major key on the same tonic and its neighbouring keys on the circle of fifths.
Connections
Practice
Keyboard Trainer
Reinforce it in practice — play and name notes on the interactive keyboard.