Question

What does this mean? It’s using a Cadd9 chord

Answer 1

Chord with a 9th note "added" to the mix. It's comprised of four notes: C, E, G and D.
Notice that the D is the 9th note that gives the Cadd9 chord its extra flavor. Try playing a C
chord and then play a C9 chord to hear that extra punch that ninth note delivers.

Answer 2

Answer:

C chord with a 9th note

Explanation:

C chord with a 9th note “added” to the mix. It's comprised of four notes: C, E, G and D. Notice that the D is the 9th note that gives the Cadd9 chord its extra flavor. Try playing a C chord and then play a C9 chord to hear that extra punch that ninth note delivers.