Bb
Db
Eb
Bb
Gb
A
Fb
C
G
Eb
Bb
C
Db
Fb
Gb
Db
A
C
G
Eb
Bb
Gb
Db
Eb
Fb
G
A
Fb
C
Eb
Bb
Gb
Db
A
Fb
Gb
G
Bb
C
G
Eb
Gb
Db
A
Fb
C
G
A
Bb
Db
Eb
Bb
Gb
A
Fb
C
G
Eb
Bb
C
Db
Fb
Gb
Db
A
C
G
Eb
Bb
Gb
Db
Eb
Fb
G
A
Fb
C
Eb
Bb
Gb
Db
A
Fb
Gb
G
Bb
C
G
Eb
Gb
Db
A
Fb
C
G
A
Bb
Db
Eb
Bb
Gb
A
Fb
C
G
Eb
Bb
C
Db
Fb
Gb
Db
Bb Whole-Half Diminished Scale notes: Bb C Db Eb Fb Gb G A. Formula: 1 2 b3 4 b5 b6 6 7. Chords that fit it: Bbdim, Bbdim7.
The whole-half diminished scale alternates whole and half steps: 1 2 b3 4 b5 b6 6 7. It is the natural choice over diminished 7 chords and shows up in jazz, film scores and fast metal runs. Like every diminished scale it repeats every three frets, so there are only three different ones.