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How to play a C#dim chord on Accordion

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

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

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

Blue counter bass pattern: C#dim7

C#dim Accordion chord chart

C# dim notation

Notes:

C#, E, G, B♭

Cdim button plays:
C#, E, B♭ (no G)

Intervals:

R, m3°, dim5°, dim7°

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

Left hand:

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

C# + C#dim
(D♭ + D♭dim)

Blue counter bass pattern: C#dim7

C# + Gdim

Fingering:

4 + 2

 

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