The C major seventh chord is constructed by adding a major seventh (eleven semitones above the root) to a major triad. The resulting notes—C, E, G, and B—create a sophisticated, open sound. The semitone between the major seventh and the octave gives this chord its characteristic shimmer, distinct from the more tense sound of a dominant seventh chord.
Harmonic Role
In diatonic harmony, major seventh chords occur naturally on the I and IV degrees of major scales. As a tonic chord, the Cmaj7 provides a more colorful alternative to a plain major triad, adding sophistication without creating tension. In jazz progressions, it frequently serves as a resting point, replacing the basic triad in standards and ballads.
Sound and Style
The major seventh chord is synonymous with elegance in music. It features prominently in bossa nova, jazz ballads, city pop, and R&B. On piano, experiment with different inversions and spread voicings to find the arrangement that best suits your musical context. The Cmaj7 pairs beautifully with minor seventh chords in ii–V–I progressions, which are central to functional harmony in jazz.