A system of organizing melody and harmony based on modes, which are melodic frameworks derived from the diatonic scale by starting on different scale degrees. Each mode possesses a unique intervallic structure, influencing the characteristic sound and emotional quality of a composition. For example, Dorian mode, starting on the second degree, features a minor quality, while Lydian mode, starting on the fourth degree, is characterized by a major quality with an augmented fourth interval. These modes offer alternatives to the major/minor tonal system.
The utilization of these melodic and harmonic frameworks allows for diverse musical expression, moving beyond the constraints of traditional tonality. Throughout history, they have been integral to various musical genres, including Gregorian chant, folk music, and jazz. This method of composition offers composers a richer palette of colors and moods, facilitating nuanced emotional and aesthetic communication. They provide historical depth and influence contemporary musical practice.
