A minor ninth, add sharp root, 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: Am9+♯1+♯7, C7+6+♯5+♯7, C7+6+♯5+♭1, E+4+♯2+♯4+♯5, E+4+♯2+♯4+♯12, E+4+♯2+♯5+♯11.

Notes in this chord: A♭, A, A♯, C, E, G, B. Integer notation: {0, 4, 7, 8, 9, 10, 11}.

Nearby chords (one less note): Am9+♯1, C7+6+♯5, E+4+♯2+♯4, E+4+♯2+♯5, E+4+♯4+♯5, E+♯2+♯4+♯5, G4+2+♯1+♯2.

Nearby chords (one more note): B13♯5♭9+♯7, FM11+♯2+♯4, A9+♯1+♯2+♯7, E13♯9♭13+♯4, G♭11♭5+♯1+♯2.

Parallel chords (same structure, different root): Cm9+♯1+♭1, Dm9+♯1+♭1, Em9+♯1+♭1, Fm9+♯1+♭1, Gm9+♯1+♭1, Bm9+♯1+♭1, D♭m9+♯1+♭1, E♭m9+♯1+♭1, G♭m9+♯1+♭1, A♭m9+♯1+♭1, B♭m9+♯1+♭1.

This chord contains too many notes to play on the 6 strings of guitar standard EADGBE tuning (change tuning or instrument).