|6||x or Ab||4th fretfr.||optionalopt.|
Guitar chords in the key of C# or Db:
Chord Db13 (3rd fret) notes: (Ab), Db, F, Cb, Eb and Bb. (Cb=B).
The note Ab on the sixth string is not required, but can be played on the 4th fret if needed.
Db13 - Db(C#) dominant 13th guitar chord.
1(C#/Db), 3(F), 5(G#/Ab), b7(B/Cb), 9(D#/Eb), 13(A#/Bb).