Bb
F
Db
Ab
Bb
Cb
D
E
Cb
G
Bb
F
Db
Ab
E
Cb
Db
D
F
G
D
Bb
Db
Ab
E
Cb
G
D
E
F
Ab
Bb
F
Db
E
Cb
G
D
Bb
F
G
Ab
Cb
Db
Ab
E
G
D
Bb
F
Db
Ab
Bb
Cb
D
E
Cb
G
Bb
F
Db
Ab
E
Cb
Db
D
F
G
D
Bb
Db
Ab
E
Cb
G
D
E
F
Ab
Bb
F
Db
E
Cb
G
D
Bb
F
G
Ab
Cb
Db
Ab
E
G
D
Bb
F
Db
Ab
Bb
Cb
D
E
Cb
G
Bb
F
Db
Ab
E
Cb
Db
F Whole-Half Diminished Scale notes: F G Ab Bb Cb Db D E. Formula: 1 2 b3 4 b5 b6 6 7. Chords that fit it: Fdim, Fdim7.
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.