A major 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: B1+7, B1+♯6, C♭1+7, B1+♯13, C♭1+♯6, C♭1+♯13.

Notes in this chord: A, B. Integer notation: {9, 11}.

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

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

Nearby chords (one less note): A1, B1.

Nearby chords (one more note): A3+2, D6-3, E♯♭5, G3+2, G♭m4, A2+♯1, A2+♯2, A2+♯7, Asus2, Asus2♭5.

Parallel chords (same structure, different root): C2, D2, E2, F2, G2, B2, 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):