Ab Half-Whole Diminished Scale

Ab – Bbb – Cb – C – Ebb – Eb – F – Gb – Ab

Formula:H-W-H-W-H-W-H-W

Intervals:P1-m2-m3-M3-d5-P5-M6-m7

Ab Half-Whole Diminished Scale Notes

Degree	Name	Note	Interval
1	Tonic	Ab4	P1
2	Supertonic	Bbb4	m2
3	Mediant	Cb4	m3
4	Subdominant	C5	M3
5	Dominant	Ebb5	d5
6	Submediant	Eb5	P5
7	Leading Tone	F5	M6
8	Octave	Gb5	m7
9	Degree 9	Ab5	—

The key of Ab Half-Whole Diminished Scale has 4 flats: B♭, E♭, A♭, D♭.

B♭E♭A♭D♭

These are the diatonic triads built on each degree of the Ab Half-Whole Diminished Scale:

Degree	Numeral	Chord	Quality
1	I	Ab Major	Major
2	ii	Bb Minor	Minor
3	iii	C Minor	Minor
4	IV	Db Major	Major
5	V	Eb Major	Major
6	vi	F Minor	Minor
7	vii°	G Diminished	Diminished