A4+♯1+♯7+♯9
A dominant fourth, add sharp root, add sharp seventh, add sharp ninth
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MSK 007 Leapfrog VCF
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MSK 009 Coiler VCF
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Equivalent chord symbols: A4+♯1+♯2+♯7, A4+♯1+♯2+♭1, A♭♭5+2+4+♯1, A♭♭5+2+4+♭2, A♭♭5+2+4+♭9.
Notes in this chord: A, A♯, C♯, D, G♯, B♯. Integer notation: {0, 1, 2, 8, 9, 10}.
Nearby chords (one less note): A4+♯1+♯2, A4+♯1+♯7, A♭4+2+♯1, A♭♭5+2+4, A♭♭5+2+♯1, A♭♭5+4+♯1.
Nearby chords (one more note): AM11♯9+♯1, A♭11♭5+♯1, B♭9+♯2+♯7, A♭M11♭5+♯1, A♭+2+4+♯1+♯4, A♭dim+2+4+♯1+♯3.
Parallel chords (same structure, different root): D4+♯1+♯7+♯9, E4+♯1+♯7+♯9, G4+♯1+♯7+♯9, B4+♯1+♯7+♯9, E♭4+♯1+♯7+♯9, A♭4+♯1+♯7+♯9, B♭4+♯1+♯7+♯9.
Experimental fretting charts for guitar standard EADGBE tuning (change tuning or instrument):
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