A+♯4+♯9

A major, add sharp fourth, 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: A+♯2+♯4, A+♯2+♯11, C3+♯1+♯2+♭7.

Notes in this chord: A, C♯, D♯, E, B♯. Integer notation: {0, 1, 3, 4, 9}.

Nearby chords (one less note): A+♯2, A+♯4, Am+♯4, Adim+♯3, C3+♯1+♯2.

Nearby chords (one more note): A11♯9♯11, A6+♯2+♯4, A+2+♯2+♯4, A+4+♯2+♯4, A+♯1+♯2+♯4, A+♯2+♯4+♯5, A♭+4+♯1+♯5.

Parallel chords (same structure, different root): C+♯4+♯9, D+♯4+♯9, E+♯4+♯9, F+♯4+♯9, G+♯4+♯9, B+♯4+♯9, C♭+♯4+♯9, D♭+♯4+♯9, E♭+♯4+♯9, F♭+♯4+♯9, G♭+♯4+♯9, A♭+♯4+♯9, B♭+♯4+♯9, C♯+♯4+♯9, D♯+♯4+♯9, E♯+♯4+♯9, F♯+♯4+♯9, G♯+♯4+♯9, A♯+♯4+♯9, B♯+♯4+♯9.

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

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