What is a Cmaj9 on piano?
Explanation: The C major ninth is a five-note chord and can be regarded as a Cmaj7 with an added ninth. It is often abbreviated as Cmaj9 (not to be confused with C9). Theory: The Cmaj9 chord is constructed with a root, a major third, a perfect fifth, a major seventh and a major ninth.
What is a 7 piano chord?
A 7th chord
The chord is often abbreviated as A7. Theory: The A seventh chord is constructed with a root, a major thirdAn interval consisting of four semitones, a perfect fifthAn interval consisting of seven semitones and a minor seventhAn interval consisting of ten semitones and the 7th scale degree.