A+♭1+♭9

A major, add flat root, add flat ninth

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MSK 007 Leapfrog VCF (patch; see in online store)
MSK 009 Coiler VCF (patch; see in online store)

Equivalent chord symbols: E6♭5+4, A+♯1+♭1, A+♭1+♭2, E6♭5+11, F♭6♭5+4, F♭6♭5+11.

Notes in this chord: A♭, A, C♯, E, B♭. Integer notation: {1, 4, 8, 9, 10}.

Nearby chords (one less note): A+♯1, A+♭1, E6♭5, F♭♭5+4, A3+♯1+♯7.

Nearby chords (one more note): AM11♭9, AM9+♯1, G♭9+♯2, A9♭9+♯7, D♭6+♯2+♯5, A+♯1+♯2+♭1, A+♯1+♯4+♭1.

Parallel chords (same structure, different root): C+♭1+♭9, D+♭1+♭9, E+♭1+♭9, F+♭1+♭9, G+♭1+♭9, B+♭1+♭9, C♭+♭1+♭9, D♭+♭1+♭9, E♭+♭1+♭9, F♭+♭1+♭9, G♭+♭1+♭9, A♭+♭1+♭9, B♭+♭1+♭9, C♯+♭1+♭9, D♯+♭1+♭9, E♯+♭1+♭9, F♯+♭1+♭9, G♯+♭1+♭9, A♯+♭1+♭9, B♯+♭1+♭9.

Experimental fretting charts for guitar standard EADGBE tuning (change tuning or instrument):

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