A minor major seventh chord is a four-note chord, which consists of four notes: the root, the minor third, the major fifth, and the major seventh.
The formula 1-b3-5-7 represents the intervallic structure of a minor major seventh chord:
For example, in a C minor major seventh chord:
The combination of these four notes (C, Eb, G, B) creates the sound of a C minor major seventh chord.
Minor major seventh chords have a unique and somewhat melancholic quality due to the combination of minor and major intervals. They are often used to convey complex emotions and add depth to compositions.
On a piano or keyboard, minor major seventh chords are typically played by pressing the root note, the minor third, the major fifth, and the major seventh.
In guitar playing, minor major seventh chords are formed by pressing down specific combinations of strings and frets, following chord diagrams or finger positions.