B flat dominant ninth, add sharp root, add sharp 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: A♯9+♯1+♯7, A♯9+♯1+♭1, A♯9+♯7+♭2, B♭9+♯1+♭1, B♭9+♯7+♭2, F6+♯2+♯4+♯10.

Notes in this chord: B♭, B, D, F, A♭, A, C. Integer notation: {0, 2, 5, 8, 9, 10, 11}.

Nearby chords (one less note): B♭9+♯1, B♭9+♯7, B♭M9+♯1, B♭9♭9+♯7, F6+♯2+♯4, F+4+♯2+♯4, A♭dim+2+♯1+♯3.

Nearby chords (one more note): C13♯5+♯7, F13♯9+♯4, G11+♯1+♯2, D13♯9♯11+♯5, B♭9+♯1+♯2+♯7.

Parallel chords (same structure, different root): C9+♯1+♯7, D9+♯1+♯7, E9+♯1+♯7, F9+♯1+♯7, G9+♯1+♯7, A9+♯1+♯7, B9+♯1+♯7, C♭9+♯1+♯7, D♭9+♯1+♯7, E♭9+♯1+♯7, F♭9+♯1+♯7, G♭9+♯1+♯7, A♭9+♯1+♯7, C♯9+♯1+♯7, D♯9+♯1+♯7, E♯9+♯1+♯7, F♯9+♯1+♯7, G♯9+♯1+♯7, A♯9+♯1+♯7, B♯9+♯1+♯7.

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