B♭maj7♯5♯11 7-string bass chord

How to play B♭maj7♯5♯11 on 7-string bass

The most common way, the first shape above: lay your index finger flat across the four strings from the A to the C at the 9th fret, your ring finger on the B string at the 11th fret, your middle finger on the E string at the 10th fret and your little finger on the D string at the 12th fret. Don’t play the F string.

From the B string 11 10 9 12 9 9 x (x: not played, 0: open)

What notes are in B♭maj7♯5♯11?

B♭maj7♯5♯11, B♭ Lydian augmented, is B♭, D, F♯, A and E: the root (B♭), the major third (D), the augmented fifth (F♯), the major seventh (A) and the sharp eleventh (E). Its formula is 1 3 ♯5 7 ♯11.