Seventh Chords. Introduction

Adding a Fourth Note A triad has three notes: root, third, fifth. A seventh chord adds one more note a third above the fifth, the seventh, making four notes total. Seventh chords are the essential harmonic vocabulary of jazz, pop, and much of modern music. Without them, most music composed after 1850 cannot be played accurately. A Cmaj7 is different..

The full lesson continues with step-by-step practice, worked examples, and the end-of-lesson quiz.