The C added ninth chord (abbreviated Cadd9 chord) is a four-note chord consisting of the notes C, E, G, and D. The chord is formed by adding a major ninth to the C major chord. Often, a major second is played instead of the major ninth since they are the same note.

So, the Cadd9 chord will be made by the triad (C,E,G) and an extra note, the one two frets above C: this note is a D. Thus Cadd9 = C,E,G,D. In the same way, and Am chord is made by the notes A,C,E, an the 9th of A is the note B (two frets above A). Thus Amadd9 = A,C,E,B.

The Cadd9 ("C add nine") guitar chordis a nice and easy, yet interesting sounding chord you can use to create some additional color in your guitar playing. Place your second (middle) finger on the third fret of the fifth string. Next, put your first (index) finger on the second fret of the fourth string. Leave the third string open.