Dominant seventh flat ninth chords (7b9) consist of a root, a major third, a perfect fifth, a minor seventh, and a flat ninth of the major scale built on the root.
Standard bass system allows you to play 7b9 chords on the accordion combining the root bass with the diminished chord of its minor 7th degree.
AKA: A7 Flat 9, A7(b9), A7/b9, A Dominant 7th b9, A Dominant Seventh Flat Nine Notes: A, C#, E, G, B♭ Intervals: R, 3°, 5°, m7°, m9° Left hand: A + Gdim Optional: A + A Major + Gdim Fingering: 3 + 2 or 4… Read More »How to play an A7b9 chord on Accordion
AKA: A sharp 7b9, A#7 Flat 9, A#7(b9), A#7/b9, A# Dominant 7th b9, A# Dominant Seventh Flat Nine Notes: A#, Cx, E#, G#, B (A#, D, F, G#, B) Intervals: R, 3°, 5°, m7°, m9° Left hand: A# + G#dim (B♭ + A♭dim) Optional: A#… Read More »How to play an A#7b9 chord on Accordion
AKA: Bb7 Flat 9, Bb7(b9), Bb7/b9, Bb Dominant 7th b9, Bb Dominant Seventh Flat Nine Notes: B♭, D, F, A♭, B Intervals: R, 3°, 5°, m7°, m9° Left hand: B♭ + A♭dim (A# + G#dim) Optional: B♭ + B♭ Major + A♭dim (A# + A#… Read More »How to play a Bb7b9 chord on Accordion
AKA: 7 Flat 9, 7(b9), 7/b9, Dominant 7th b9, Dominant Seventh Flat Nine Notes: B, D#, F#, A, C Intervals: R, 3°, 5°, m7°, m9° Left hand: B + Adim (C♭ + B♭♭dim) Optional: B + B Major + Adim (C♭ + C♭ Major +… Read More »How to play a B7b9 chord on Accordion
AKA: C7 Flat 9, C7(b9), C7/b9, C Dominant 7th b9, C Dominant Seventh Flat Nine Notes: C, E, G, B♭, D♭ Intervals: R, 3°, 5°, m7°, m9° Left hand: C + B♭dim Optional: C + C Major + B♭dim Fingering: 3 + 2 or 4… Read More »How to play a C7b9 chord on Accordion
AKA: C#7 Flat 9, C#7(b9), C#7/b9, C# Dominant 7th b9, C# Dominant Seventh Flat Nine Notes: C#, E#, G#, B, D (C#, F, G#, B, D) Intervals: R, 3°, 5°, m7°, m9° Left hand: C# + Bdim (D♭ + C♭dim) Optional: C# + C# Major… Read More »How to play a C#7b9 chord on Accordion
AKA: Db7 Flat 9, Db7(b9), Db7/b9, Db Dominant 7th b9, Db Dominant Seventh Flat Nine Notes: D♭, F, A♭, C♭, D (D♭, F, A♭, B, D) Intervals: R, 3°, 5°, m7°, m9° Left hand: D♭ + C♭dim (C# + Bdim) Optional: D♭ + D♭ Major… Read More »How to play a Db7b9 chord on Accordion
AKA: D7 Flat 9, D7(b9), D7/b9, D Dominant 7th b9, D Dominant Seventh Flat Nine Notes: D, F#, A, C, E♭ Intervals: R, 3°, 5°, m7°, m9° Left hand: D + Cdim Optional: D + D Major + Cdim Fingering: 3 + 2 or 4… Read More »How to play a D7b9 chord on Accordion
AKA: D sharp 7b9, D#7 Flat 9, D#7(b9), D#7/b9, D# Dominant 7th b9, D# Dominant Seventh Flat Nine Notes: D#, Fx, A#, C#, E (D#, G, A#, C#, E) Intervals: R, 3°, 5°, m7°, m9° Left hand: D# + C#dim (E♭ + D♭dim) Optional: D#… Read More »How to play a D#7b9 chord on Accordion
AKA: Eb7 Flat 9, Eb7(b9), Eb7/b9, Eb Dominant 7th b9, Eb Dominant Seventh Flat Nine Notes: E♭, G, B♭, D♭, E Intervals: R, 3°, 5°, m7°, m9° Left hand: E♭ + D♭dim (D# + C#dim) Optional: E♭ + E♭ Major + D♭dim (D# + D#… Read More »How to play an Eb7b9 chord on Accordion
AKA: E7 Flat 9, E7(b9), E7/b9, E Dominant 7th b9, E Dominant Seventh Flat Nine Notes: E, G#, B, D, F Intervals: R, 3°, 5°, m7°, m9° Left hand: E + Ddim Optional: E + E Major + Ddim Fingering: 3 + 2 or 4… Read More »How to play an E7b9 chord on Accordion
AKA: F7 Flat 9, F7(b9), F7/b9, F Dominant 7th b9, F Dominant Seventh Flat Nine Notes: F, A, C, E♭, G♭ Intervals: R, 3°, 5°, m7°, m9° Left hand: F + E♭dim Optional: F + F Major + E♭dim Fingering: 3 + 2 or 4… Read More »How to play an F7b9 chord on Accordion
AKA: F sharp 7b9, F#7 Flat 9, F#7(b9), F#7/b9, F# Dominant 7th b9, F# Dominant Seventh Flat Nine Notes: F#, A#, C#, E, G Intervals: R, 3°, 5°, m7°, m9° Left hand: F# + Edim (G♭ + F♭dim) Optional: F# + F# Major + Edim… Read More »How to play an F#7b9 chord on Accordion
AKA: Gb7 Flat 9, Gb7(b9), Gb7/b9, Gb Dominant 7th b9, Gb Dominant Seventh Flat Nine Notes: G♭, B♭, D♭, F♭, G (G♭, B♭, D♭, E, G) Intervals: R, 3°, 5°, m7°, m9° Left hand: G♭ + F♭dim (F# +Edim) Optional: G♭ + G♭ Major + F♭dim… Read More »How to play a Gb7b9 chord on Accordion
AKA: G7 Flat 9, G7(b9), G7/b9, G Dominant 7th b9, G Dominant Seventh Flat Nine Notes: G, B, D, F, A♭ Intervals: R, 3°, 5°, m7°, m9° Left hand: G + Fdim Optional: G + G Major + Fdim Fingering: 3 + 2 or 4… Read More »How to play a G7b9 chord on Accordion
AKA: G sharp 7b9, G#7 Flat 9, G#7(b9), G#7/b9, G# Dominant 7th b9, G# Dominant Seventh Flat Nine Notes: G#, B#, D#, F#, A (G#, C, D#, F#, A#) Intervals: R, 3°, 5°, m7°, m9° Left hand: G# + F#dim (A♭ + G♭dim) Optional: G#… Read More »How to play a G#7b9 chord on Accordion
AKA: Ab7 Flat 9, Ab7(b9), Ab7/b9, Ab Dominant 7th b9, Ab Dominant Seventh Flat Nine Notes: A♭, C, E♭, G♭, A Intervals: R, 3°, 5°, m7°, m9° Left hand: A♭ + G♭dim (G# + F#dim) Optional: A♭ + A♭ Major + G♭dim (G# + G#… Read More »How to play an Ab7b9 chord on Accordion