B♭maj7♯5 8-string bass chord

How to play B♭maj7♯5 on 8-string bass

The most common way, the first shape above: your little finger on the F♯ string at the 4th fret, your ring finger on the B string at the 3rd fret, your index finger on the E string at the 2nd fret and your middle finger on the G string at the 2nd fret. Let the A and D strings ring open. Don’t play the C and F strings.

From the F♯ string 4 3 2 0 0 2 x x (x: not played, 0: open)

What notes are in B♭maj7♯5?

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