While pursuing the development of the rhythmic and melodic parameters in the continuation of the previous volumes, the authors insist on the mastery of the scales, of the modulations, of the tonal system in general, but also of the natural modes and other scales, without forgetting the development of the perception of the degrees, of the four main cadences, of the seventh chords, as well as that of the practice of the keys and the approach to oral and written transposition.