Am9♭5 6-string bass chord

How to play Am9♭5 on 6-string bass

The most common way, the first shape above: lay your index finger flat across the four strings from the B to the D at the 10th fret, your middle finger on the E string at the 11th fret, your little finger on the G string at the 12th fret and your ring finger on the C string at the 11th fret.

From the B string 10 11 10 10 12 11 (x: not played, 0: open)

What notes are in Am9♭5?

Am9♭5, A half-diminished ninth, is A, C, E♭, G and B: the root (A), the minor third (C), the diminished fifth (E♭), the minor seventh (G) and the ninth (B). Its formula is 1 ♭3 ♭5 ♭7 9.