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How to play an Adim chord on Accordion

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

AKA: A diminished seventh, A°, Adim, Adim7, Adim7th, Adim/6, Adim(add6)

Green bass pattern: Adim7(omit5) = Am6(omit5)

Blue counter bass pattern: Adim7

Adim Accordion chord chart

A dim notation

Notes:

A, C, E♭, G♭

Adim button plays:
A, C, G♭ (no E♭)

Intervals:

R, m3°, m5°, dim7°

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

Left hand:

Green bass pattern:
Adim7(omit5), same as Am6(omit5)

A + Adim
(B♭♭ + B♭♭dim)

Blue counter bass pattern: Adim7

A + E♭dim

Fingering:

4 + 2

 

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