B♭maj7♯5 7-string bass chord

How to play B♭maj7♯5 on 7-string bass

The most common way, the first shape above: lay your index finger flat across the five strings from the A to the F at the 1st fret, your ring finger on the G string at the 2nd fret and your little finger on the C string at the 2nd fret. Don’t play the B, E and D strings.

From the B string x x 1 x 2 2 1 (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.