A13♭9 7-string bass chord

How to play A13♭9 on 7-string bass

The most common way, the first shape above: lay your index finger flat across the four strings from the D to the F at the 5th fret, your ring finger on the G string at the 6th fret and your little finger on the C string at the 6th fret. Let the A string ring open. Don’t play the B and E strings.

From the B string x x 0 5 6 6 5 (x: not played, 0: open)

What notes are in A13♭9?

A13♭9, A thirteenth flat nine, is A, C♯, E, G, B♭ and F♯: the root (A), the major third (C♯), the perfect fifth (E), the minor seventh (G), the flat ninth (B♭) and the thirteenth (F♯). Its formula is 1 3 5 ♭7 ♭9 13.