Jazz Dancers

Jazz: Miles Davis and Modality
By Ed Byrne

To learn what Miles Davis thought of his music from his modal period (circa 1958-63), the best source is Davis' autobiography, Miles: The Autobiography, in which he states that he was prompted into this style of improvising on fewer chords by Gil Evans' arrangements of George Gershwin’s Porgy and Bess. He also states that George Russell recommended pianist Bill Evans (no relation) to Davis around the same time period (1958) for his LP Kind of Blue on the strength of Evans' knowledge of the music of French Impressionist composers Claude Debussy and Maurice Ravel. Davis subsequently became infatuated with Revel’s Concerto for the Left Hand, and spent roughly the next 13 years incorporating the latter composer's devices from that particular piece into a distinctive Davis style of what some historians (Winthrop Sargeant, for example) termed Impressionist Jazz: unresolved melodic tensions, quartal harmony, non-functional chord successions (as opposed to progressions), extended pedal points, bi-tonality, and other salient early Twentieth century characteristics.

Having said all of this, however, I must point out that jazz is not modal, including Davis' music of the period in question. Jazz scholar Barry Kernfeld, for example, calls this music Davis' Vamp Style, explaining that this style does not fulfill the musical characteristics which scholars attribute to modal music. Check out the New Groves Dictionary of Music and the New Groves Dictionary of Jazz. In brief, modality is a medieval style based on melody--not chords, unlike Mozart's music, whose melodies are guided by and outline chord progressions which move forward through the circle of fifths towards cadences in tonal keys. True modal music is a melodic rather than a harmonic concept. Even when harmony is introduced to modality, it does not guide its behavior. Moreover, the mere absence of chord progressions--or the presence of pedal points--does not constitute modality.