The mmaj7, short for minor-major seventh chord, is an intriguing and somewhat darker-sounding chord quality. It blends the characteristics of both minor and major chords, creating a unique sound palette. Structurally, it is formed by taking a minor triad and adding a major seventh interval above the root. This combination can evoke a mysterious, tense, or complex mood in music. The fundamental notes of an mmaj7 chord, based on a root of C, would include C (root), E♭ (minor third), G (perfect fifth), and B (major seventh). This chord is popular in jazz and film music for its ability to convey deep emotion and unresolved tension, often leading listeners through unexpected harmonic landscapes. When playing the mmaj7 on the guitar, it may involve unconventional finger positioning due to the need to incorporate the major seventh note. Guitarists are encouraged to experiment across the fretboard to discover voicings that best suit their playing style or compositional needs.