Cadd9 (see Example 4) on the other hand simply adds the 9th to an existing C major (or minor ... F natural on the 3rd fret of the fourth string, you’ll have Dm(add4). When we extend a chord ...

Guitar skills: 'Add’ chords come in the form of either ‘add9’ or ‘add11’. The name tells you to add either a 9th or 11th interval to a basic major or minor chord. So, Cadd9 is a C chord ...