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How to play a Gbdim chord on Accordion

On the Stradella bass system, diminished 7th chords are also minor 6th chords

AKA: Gb diminished seventh, Gb°, Gbdim, Gbdim7, Gbdim7th, Gbdim/6, Gbdim(add6)

Green bass pattern: Gbdim7(omit5) = Gbm6(omit5)

Blue counter bass pattern: Gbdim7

Gbdim Accordion chord chart

Gb dim notation

Notes:

G♭, B♭♭, D♭♭, F♭♭
(G♭, A, C, E♭)

G♭dim button plays:
G♭, B♭♭, F♭♭ (no D♭♭)
(G♭, A, E♭) (no C)

Intervals:

R, m3°, m5°, dim7°

Dim buttons play:
R, m3°, dim7° (no 5°)

Left hand:

Green bass pattern:
Gbdim7(omit5), same as Gbm6(omit5)

G♭ + G♭dim
(F# + F#dim)

Blue counter bass pattern: Gbdim7

Enharmonic F# + Cdim

Fingering:

4 + 2

 

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