C9+♯1+♯7+♭7

C dominant ninth, add sharp root, add sharp seventh, add flat seventh

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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: A11+♯1+♯2, A11+♯1+♯9, A11+♯2+♭2.

Notes in this chord: C, C♯, E, G, B♭♭, B♭, B, D. Integer notation: {0, 1, 2, 4, 7, 9, 10, 11}.

Nearby chords (one less note): A11+♯1, A11+♯2, Am11+♯1, A11♯9+♯1, A9+♯1+♯2, C9+♯1+♯7, A+2+4+♯1+♯2, G+2+4+♯2+♯4.

Nearby chords (one more note): A13+♯1+♯2, G13+♯2+♯4, A11+♯1+♯2+♯4, A11+♯1+♯2+♯7.

Parallel chords (same structure, different root): D9+♯1+♯7+♭7, E9+♯1+♯7+♭7, F9+♯1+♯7+♭7, G9+♯1+♯7+♭7, A9+♯1+♯7+♭7, B9+♯1+♯7+♭7, D♭9+♯1+♯7+♭7, E♭9+♯1+♯7+♭7, G♭9+♯1+♯7+♭7, A♭9+♯1+♯7+♭7, B♭9+♯1+♯7+♭7.

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