The maj9 chord, pronounced "major nine," extends the sound of a major seventh chord by adding an additional ninth interval from the root. Known for its rich and full-toned character, the maj9 chord creates a sense of lush harmony often used in jazz, R&B, and pop settings. It conveys a sophisticated and dreamy sound, enhancing the emotional depth and smoothness of a musical piece. To play a maj9 chord, guitarists typically add a ninth note (which is the second scale degree of the chord raised an octave) atop a regular major triad. This chord quality invites an open, expansive feel, making it perfect for elevating any harmonized arrangement.