A2+♯2+♭1

A major second, add sharp second, add flat root

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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: A2+♯2+♯7, A2+♯7+♯9, A♭3+♯1+♯2, A♭3+♯1+♯9, G♯3+♯1+♯2, G♯3+♯1+♯9.

Notes in this chord: A♭, A, B, B♯. Integer notation: {0, 8, 9, 11}.

Nearby chords (one less note): A2+♯2, A2+♯7, A♭3+♯1, A♭3+♯2.

Nearby chords (one more note): E+4+♯5, F+♯2+♯4, G4+2+♯1, A♭+♯1+♯2, A♭4+♯1+♯2, G♭dim+2+4, A♭♭5+♯1+♯2, A♭3+2+♯1+♯2.

Parallel chords (same structure, different root): D2+♯2+♭1, G2+♯2+♭1, E♭2+♯2+♭1, A♭2+♯2+♭1, B♭2+♯2+♭1.

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

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