Irish bouzouki Cadd9 chord (ADAD)C added ninth: 3 2 5 5, and 3 more shapes

Frets, low course to high: 3 2 5 5 (from the 2nd fret)

1. Low A course: 3rd fret, middle finger, C
2. Low D course: 2nd fret, index finger, E
3. High A course: 5th fret, little finger (barre), D
4. High D course: 5th fret, little finger (barre), G

Sounds: C E D G  ·  Cadd9 is C, E, G, D (1 · 3 · 5 · 9)

Open courses that ring: D is a note of Cadd9, so it can drone under it.

With a capo: on the 5th fret it’s 0 0 2 5 (frets counted from the capo), an open Gadd9 shape.

Tuning ADAD: A D A D, low to high.