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How to play a F#dim chord on Accordion

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

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

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

Blue counter bass pattern: F#dim7

F#dim Accordion chord chart

F# dim notation

Notes:

F#, A, C, E♭

F#dim button plays:
F#, A, E♭ (no C)

Intervals:

R, m3°, dim5°, dim7°

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

Left hand:

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

F# + F#dim
(G♭ + G♭dim)

Blue counter bass pattern: F#dim7

F# + Cdim

Fingering:

4 + 2

 

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