Bb Half-Whole Diminished Scale

Bb – Cb – Db – D – Fb – F – G – Ab – Bb

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

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

Bb Half-Whole Diminished Scale Notes

Degree	Name	Note	Interval
1	Tonic	Bb4	P1
2	Supertonic	Cb4	m2
3	Mediant	Db5	m3
4	Subdominant	D5	M3
5	Dominant	Fb5	d5
6	Submediant	F5	P5
7	Leading Tone	G5	M6
8	Octave	Ab5	m7
9	Degree 9	Bb5	—

The key of Bb Half-Whole Diminished Scale has 2 flats: B♭, E♭.

B♭E♭

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

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