A♭7♭9♯9 7-string bass chord

How to play A♭7♭9♯9 on 7-string bass

The most common way, the first shape above: lay your index finger flat across the four strings from the A to the C at the 3rd fret, your middle finger on the E string at the 4th fret, your ring finger on the D string at the 4th fret, your ring finger on the G string at the 4th fret and your little finger on the F string at the 4th fret. Don’t play the B string.

From the B string x 4 3 4 4 3 4 (x: not played, 0: open)

What notes are in A♭7♭9♯9?

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