A4+2+♯1+♯9

A major fourth, add second, add sharp root, add sharp ninth

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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: A4+2+♯1+♯2, A4+2+♯1+♭3, B♭3+2+♯1+♯2+♯7, B♭3+2+♯1+♯2+♭1.

Notes in this chord: A, A♯, B, C♯, D, B♯. Integer notation: {0, 1, 2, 9, 10, 11}.

Nearby chords (one less note): A4+2+♯1, A4+2+♯2, A4+♯1+♯2, Am4+2+♯1, A3+2+♯1+♯2, B♭3+2+♯1+♯2.

Nearby chords (one more note): Bm9+♯1+♯7, B♭M9+♯1+♯2, A+2+4+♯1+♯2, G+2+4+♯2+♯4, Adim+2+4+♯1+♯3, A♭dim+2+4+♯1+♯3.

Parallel chords (same structure, different root): C4+2+♯1+♯9, D4+2+♯1+♯9, E4+2+♯1+♯9, F4+2+♯1+♯9, G4+2+♯1+♯9, B4+2+♯1+♯9, D♭4+2+♯1+♯9, E♭4+2+♯1+♯9, G♭4+2+♯1+♯9, A♭4+2+♯1+♯9, B♭4+2+♯1+♯9.

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

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