B flat dominant eleventh, 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: F13♯9+♯4, E♯13♯9+♯4, F13♯9+♯11, A♯11+♯1+♯7, B♭11+♯1+♯7, E♯13♯9+♯11.

Notes in this chord: B♭♭, B♭, B, D, F, A♭, C, E♭. Integer notation: {0, 2, 3, 5, 8, 9, 10, 11}.

Nearby chords (one less note): F13♯9, B♭11+♯1, F13♯9♭5, B♭M11+♯1, F11♯9+♯4, F13♯9♯11, B♭9+♯1+♯7, A♭+2+♯1+♯2+♯4.

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

Parallel chords (same structure, different root): C11+♯1+♭1, D11+♯1+♭1, E11+♯1+♭1, F11+♯1+♭1, G11+♯1+♭1, A11+♯1+♭1, B11+♯1+♭1, D♭11+♯1+♭1, E♭11+♯1+♭1, G♭11+♯1+♭1, A♭11+♯1+♭1, B♯11+♯1+♭1.

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