A7♭5 7-string bass chord

How to play A7♭5 on 7-string bass

The most common way, the first shape above: your index finger on the D string at the 1st fret and your middle finger on the C string at the 1st fret. Let the A and G strings ring open. Don’t play the B, E and F strings.

From the B string x x 0 1 0 1 x (x: not played, 0: open)

What notes are in A7♭5?

A7♭5, A dominant seventh flat five, is A, C♯, E♭ and G: the root (A), the major third (C♯), the diminished fifth (E♭) and the minor seventh (G). Its formula is 1 3 ♭5 ♭7.