A major, add second

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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+9, AM+2, C♯m7♯5, D♭m7♯5, B11-3-5, C♭11-3-5.

Notes in this chord: A, B, C♯, E. Integer notation: {1, 4, 9, 11}.

Keys in which this chord fits with this spelling: DM, EM, AM, Bm, C♯m, F♯m

Keys in which this chord fits with enharmonic spelling: F♭M, C♭m, D♭m, G♭m

Nearby chords (one less note): A, A3+2, E6-3, Asus2.

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

Parallel chords (same structure, different root): C+2, D+2, E+2, F+2, G+2, B+2, C♭+2, D♭+2, E♭+2, F♭+2, G♭+2, A♭+2, B♭+2, C♯+2, D♯+2, E♯+2, F♯+2, G♯+2, A♯+2, B♯+2.

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