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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°, dim5°, dim7°

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

    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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