B♭maj7♯5♯11 8-string bass chord

How to play B♭maj7♯5♯11 on 8-string bass

The most common way, the first shape above: your ring finger on the F♯ string at the 4th fret, your index finger on the B string at the 3rd fret, your little finger on the D string at the 4th fret and your middle finger on the G string at the 3rd fret. Let the E and A strings ring open. Don’t play the C and F strings.

From the F♯ string 4 3 0 0 4 3 x 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.