A♭+9

A flat major, add 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: A♭+2, G♯+2, G♯+9, A♭M+2, Cm7♯5, G♯M+2.

Notes in this chord: A♭, C, E♭, B♭. Integer notation: {0, 3, 8, 10}.

Keys in which this chord fits with this spelling: D♭M, E♭M, A♭M, Cm, Fm, B♭m

Keys in which this chord fits with enharmonic spelling: C♯M, D♯M, G♯M, E♯m, A♯m, B♯m

Nearby chords (one less note): A♭, A♭3+2, E♭6-3, A♭sus2.

Nearby chords (one more note): A♭9, A♭M9, A♭9♭7, A♭+2+4, A♭+2+♯1, A♭+2+♯2, A♭+2+♯4, A♭+2+♯5.

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

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

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