A♯+4+♯2+♭1

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

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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♯M11♯9, B♭M11♯9, F13♯5-9, A♯11♯7♯9, B♭11♯7♯9, B♭+4+♯2+♭1.

Notes in this chord: A, A♯, B♯♯, C♯♯, D♯, E♯. Integer notation: {1, 2, 3, 5, 9, 10}.

Nearby chords (one less note): F7♯5+6, B♭+4+♯2, B♭+4+♭1, D♭9♯5♭7, A4+♯1+♯4, B♭+♯2+♭1.

Nearby chords (one more note): F13♯5, F13♯5♯9, F13♯5♭9, B♭M11+♯2, B♭M11♯9+♯1, B♭M11♯9+♯4.

Parallel chords (same structure, different root): C+4+♯2+♭1, D+4+♯2+♭1, E+4+♯2+♭1, F+4+♯2+♭1, G+4+♯2+♭1, A+4+♯2+♭1, B+4+♯2+♭1, C♭+4+♯2+♭1, D♭+4+♯2+♭1, E♭+4+♯2+♭1, F♭+4+♯2+♭1, G♭+4+♯2+♭1, A♭+4+♯2+♭1, B♭+4+♯2+♭1, C♯+4+♯2+♭1, D♯+4+♯2+♭1, E♯+4+♯2+♭1, F♯+4+♯2+♭1, G♯+4+♯2+♭1, B♯+4+♯2+♭1.

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

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