The Minor Ninth Chord extends the Minor Seventh Chord by adding a major ninth. The notes are: root, minor third, perfect fifth, minor seventh, and major ninth. Its sound is rich, dense, and sophisticated, with a distinctive character of 'refined melancholy' or 'night dream'. The major ninth adds a particular openness and resonance that makes the chord less 'heavy' than a simple Min7. It is a chord much loved in jazz, neo-soul, and fusion for its depth and enveloping color. It works excellently as an enriched minor tonic chord (i9) or, more commonly, as ii9 in ii-V-i progressions, adding further depth to the harmonic movement.