A flat major, add fourth

music notation
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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: G♯+4, A♭+♯3, A♭+11, G♯+♯3, G♯+11, D♭sus2+♭1.

Notes in this chord: A♭, C, D♭, E♭. Integer notation: {0, 1, 3, 8}.

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

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

Nearby chords (one less note): A♭, A♭4, D♭2+♯7, D♭sus2.

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

Parallel chords (same structure, different root): C+4, D+4, E+4, F+4, G+4, A+4, B+4, C♭+4, D♭+4, E♭+4, F♭+4, G♭+4, B♭+4, C♯+4, D♯+4, E♯+4, F♯+4, G♯+4, A♯+4, B♯+4.

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