A major third, add second

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: A3+9, B2+7, B2+♯6, C♭2+7, B2+♯13, C♭2+♯6.

Notes in this chord: A, B, C♯. Integer notation: {1, 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): A2, A3, B2.

Nearby chords (one more note): A+2, A4+2, A9-5, B9-5, D♭7♯5, G♭m+4, B2+6+7, A3+2+♯1, B2+7+♯1.

Parallel chords (same structure, different root): C3+2, D3+2, E3+2, F3+2, G3+2, B3+2, C♭3+2, D♭3+2, E♭3+2, F♭3+2, G♭3+2, A♭3+2, B♭3+2, C♯3+2, D♯3+2, E♯3+2, F♯3+2, G♯3+2, A♯3+2, B♯3+2.

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