A#
C#
D#
A#
F#
A
E
B#
G
D#
A#
B#
C#
E
F#
C#
A
B#
G
D#
A#
F#
C#
D#
E
G
A
E
B#
D#
A#
F#
C#
A
E
F#
G
A#
B#
G
D#
F#
C#
A
E
B#
G
A
A#
C#
D#
A#
F#
A
E
B#
G
D#
A#
B#
C#
E
F#
C#
A
B#
G
D#
A#
F#
C#
D#
E
G
A
E
B#
D#
A#
F#
C#
A
E
F#
G
A#
B#
G
D#
F#
C#
A
E
B#
G
A
A#
C#
D#
A#
F#
A
E
B#
G
D#
A#
B#
C#
E
F#
C#
F# Half-Whole Diminished Scale notes: F# G A A# B# C# D# E. Formula: 1 b2 b3 3 #4 5 6 b7. Chords that fit it: F#, F#m, F#7, F#m7, F#dim, F#dim7, F#m7b5, F#5.
The half-whole diminished scale alternates half and whole steps: 1 b2 b3 3 #4 5 6 b7. It fits dominant chords with b9 and #9, so it is a jazz and fusion staple over 7b9 chords. It is symmetric: the pattern repeats every three frets, so there are only three different ones.