Polytonality

Polytonality (also polyharmony^[1]) is the musical use of more than one key simultaneously. Bitonality is the use of only two different keys at the same time. Polyvalence or polyvalency is the use of more than one harmonic function, from the same key, at the same time.^[2]

Not to be confused with Polyphony.

Some examples of bitonality superimpose fully harmonized sections of music in different keys.

List of polytonal pieces

Bimodality

Polymodal chromaticism

Elektra chord

Bridge chord

Woody Shaw

Beach, David (1983). Aspects of Schenkerian Theory. New Haven and London: Yale University Press. 978-0-300-02800-3.

ISBN

(1941–42). The Craft of Musical Composition, vols. 1 and 2, translated by Arthur Mendel and Otto Ortmann. New York: Associated Music Publishers; London: Schott. Original German edition as Unterweisung im Tonsatz. 3 vols. Mainz, B. Schott's Söhne, 1937–70.

Hindemith, Paul

(1978). Tonality, Atonality, Pantonality A Study of Some Trends in Twentieth Century Music. Greenwood Publishing Group. ISBN 978-0-313-20478-4.

Reti, Rudolph

(1997). "Comments by Carl Wilson". The Pet Sounds Sessions (Booklet). The Beach Boys. Capitol Records.

Wilson, Carl

Wilson, Paul (1992). The Music of Béla Bartók. Yale University Press. 978-0-300-05111-7.