Am7♭9 7-string bass chord

How to play Am7♭9 on 7-string bass

The most common way, the first shape above: your middle finger on the D string at the 5th fret, your ring finger on the G string at the 5th fret, your index finger on the C string at the 4th fret and your little finger on the F string at the 5th fret. Let the A string ring open. Don’t play the B and E strings.

From the B string x x 0 5 5 4 5 (x: not played, 0: open)

What notes are in Am7♭9?

Am7♭9, A minor seventh flat nine, is A, C, E, G and B♭: the root (A), the minor third (C), the perfect fifth (E), the minor seventh (G) and the flat ninth (B♭). Its formula is 1 ♭3 5 ♭7 ♭9.