B flat dominant thirteenth, add sharp root, add sharp fourth

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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♯13+♯1+♯4, A♯13+♯4+♭2, B♭13+♯4+♭2, A♯13+♯1+♯11, B♭13+♯1+♯11, G13♯9+♯1+♯5.

Notes in this chord: B♭, B, D, E, F, A♭, C, E♭, G. Integer notation: {0, 2, 3, 4, 5, 7, 8, 10, 11}.

Nearby chords (one less note): B♭13+♯1, B♭13+♯4, G13♯9+♯1, G13♯9+♯5, G13♭9+♯5, B♭13♭5+♯1, B♭13♭9+♯4, B♭11+♯1+♯4, G13♯5♯9+♯1.

Nearby chords (one more note): G13+♯1+♯2+♯5, B♭13+♯1+♯2+♯4, B♭13+♯1+♯4+♯5.

Parallel chords (same structure, different root): C13+♯1+♯4, D13+♯1+♯4, E13+♯1+♯4, F13+♯1+♯4, G13+♯1+♯4, A13+♯1+♯4, B13+♯1+♯4, C♭13+♯1+♯4, D♭13+♯1+♯4, E♭13+♯1+♯4, F♭13+♯1+♯4, G♭13+♯1+♯4, A♭13+♯1+♯4, C♯13+♯1+♯4, D♯13+♯1+♯4, E♯13+♯1+♯4, F♯13+♯1+♯4, G♯13+♯1+♯4, A♯13+♯1+♯4, B♯13+♯1+♯4.

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