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How to play an A#dim chord on Accordion

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

AKA: A# diminished seventh, A#°, A#dim, A#dim7, A#dim7th, A#dim/6, A#dim(add6)

Green bass pattern: A#dim7(omit5) = A#m6(omit5)

Blue counter bass pattern: A#dim7

A#dim Accordion chord chart

A# dim notation

Notes:

A#, C#, E, G

A#dim button plays:
A#, C#, G (no E)

Intervals:

R, m3°, dim5°, dim7°

Dim buttons play:
R, m3°, dim7° (no dim5°)

Left hand:

Green bass pattern:
A#dim7(omit5), same as A#m6(omit5)

A# + A#dim
(B♭ + B♭dim)

Blue counter bass pattern: A#dim7

A# + Edim
(B♭ + F♭dim)

Fingering:

4 + 2

 

 

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