B♭7♯5 5-string bass chord

How to play B♭7♯5 on 5-string bass

The most common way, the first shape above: your index finger on the B string at the 11th fret, your middle finger on the A string at the 11th fret, your little finger on the D string at the 12th fret and your ring finger on the G string at the 11th fret. Don’t play the E string.

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

What notes are in B♭7♯5?

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