Diminished

uses of the diminished scale

a) #I dim – sub for VIx (ex: G G#dim Am D7 = G E7b9 Am D7)

use half-whole for E7b9

use whole-half for G#dim

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b) passing chord (ex: C C#dim D7 D#dim Em)

use whole-half for each dim chord

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c) #IV dim sub for IIx (ex: in key of G, C7 C#dim D7 G = C7 A7b9 D7 G7)

use whole-half for C#dim

use half-whole for A7b9

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d)  bIII dim = I dim = VIIxb9 (ex: unforgettable G Bbdim Cmaj7 = G F#7b9 Cmaj7)

use whole-half for Bbdim

use half-whole for F#7b9

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e)  bIII dim = I dim = IIxb9 (ex: Bye Bye Blackbird | F | % | Gm C7 | F | % | Abdim | Gm C7 | C7 | = | F | % | Gm C7 | F | % | G7b9 | Gm C7 | C7 |

use F whole-half dim for Abdim

use G half-whole dim for G7b9