D major ninth chord
Dmaj9 chord for piano with keyboard diagram.
Explanation: The D major ninth is a five note chord and can be regarded as a Dmaj7 with an added ninth. It is often abbreviated as Dmaj9 (should not be confused with D9).
Theory: The Dmaj9 chord is constructed with a root, a major third, a perfect fifth, a major seventh and a major ninth.
Notes: D - F# - A - C# - E