C7♭13 8-string guitar chord

How to play C7♭13 on 8-string guitar

The most common way, the first shape above: lay your index finger flat across the three strings from the A to the G at the 3rd fret, your ring finger on the D string at the 5th fret, your little finger on the high B string at the 5th fret and your middle finger on the high E string at the 4th fret. Don’t play the F♯, low B and low E strings.

From the F♯ string x x x 3 5 3 5 4 (x: not played, 0: open)

What notes are in C7♭13?

C7♭13, C dominant seventh flat thirteen, is C, E, G, B♭ and A♭: the root (C), the major third (E), the perfect fifth (G), the minor seventh (B♭) and the flat thirteenth (A♭). Its formula is 1 3 5 ♭7 ♭13.