Diminished (Half Whole) scale on guitar

The half whole diminished scale alternates half and whole steps, the jazz scale for dominant 7th chords with a flat 9th.

Also listed in the app as Octatonic Scale.

Notes in AA Bb B# C# D# E F# G
Formula1 b2 #2 3 #4 5 6 b7
StepsH W H W H W H W (W whole step, H half step)
Note count8
Style in the appSpecial, scale "Diminished Half"
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A Diminished scale on the first 15 frets in standard tuning, thin e string on top. Highlighted circles mark the root, A.

Play the A Diminished scale on the fretboard in Guitar Upscale

About the Diminished (Half Whole) scale

It steps half, whole, half, whole to the octave. It is the whole half diminished scale started one note later.

It holds the 3rd, 5th and flat 7th of a dominant chord, plus the flat 9th, sharp 9th and sharp 11th. Jazz players use it over 7b9 chords.

Like all diminished scales, its shape repeats every three frets.

Intervals from the root

DegreeIntervalSemitonesIn A
1Root0A
b2Minor 2nd1Bb
#2Minor 3rd3B#
3Major 3rd4C#
#4Tritone6D#
5Perfect 5th7E
6Major 6th9F#
b7Minor 7th10G

Same notes, another starting note

Start the A Diminished scale on another of its notes and you get these scales:

Diminished scale in every key

KeyNotesPlay it
CC Db D# E F# G A BbOpen
C#C# D E E# G G# A# BOpen
DD Eb E# F# G# A B COpen
EbEb Fb F# G A Bb C DbOpen
EE F G G# A# B C# DOpen
FF Gb G# A B C D EbOpen
F#F# G A A# B# C# D# EOpen
GG Ab A# B C# D E FOpen
G#G# A B B# D D# E# F#Open
AA Bb B# C# D# E F# GOpen
BbBb Cb C# D E F G AbOpen
BB C D D# E# F# G# AOpen

More Special scales