In jazz, a contrafact is a musical composition consisting of a new melody overlaid on a familiar harmonic structure. Contrafact can also be explained as the use of borrowed chord progressions.
As a compositional device, it was of particular importance in the 1940s development of bop, since it allowed jazz musicians to create new pieces for performance and recording on which they could immediately improvise, without having to seek permission or pay publisher fees for copyrighted materials (while melodies can be copyrighted, the underlying harmonic structure cannot be).
Contrafacts are not to be confused with musical quotations, which comprise borrowing rhythms or melodic figures from an existing composition.
In classical music, contrafacts have been used as early as the parody mass and In Nomine of the 16th century. More recently, "Cheap Imitation" (1969) by John Cage was produced by systematically changing notes from the melody line of "Socrate" by Erik Satie using chance procedures.
In spite of its usefulness, the term contrafact has not won wide acceptance in classical theory.
Well-known examples of contrafacts include the Charlie Parker/Miles Davis bop tune "Donna Lee," which uses the chord changes of the standard "Back Home Again in Indiana" or Thelonious Monk's jazz standard "Evidence", which borrows the chord progression from Jesse Greer and Raymond Klages's song "Just You, Just Me" (1929). The Gershwin tune "I Got Rhythm" has proved especially amenable to contrafactual recomposition: the popularity of its "rhythm changes" is second only to that of the 12-bar blues as a basic harmonic structure used by jazz composers. "I Got Rhythm" is not a 32-bar form, however, the tunes that are written on "rhythm changes" omit the last four bars.
See also 
- _______ (2007), "Contrafact", The New Grove Dictionary of Jazz;, 2nd Edition, Oxford University Press
- "The Uses of Existing Music: Musical Borrowing as a Field". J. Peter Burkholder. Notes, Second Series, Vol. 50, No. 3 (Mar., 1994), pp. 851-870. Published by: Music Library Association.
- Rosenthal, David, H. Hard Bop: Jazz and Black Music 1955-1965. New York: Oxford University Press. ISBN 0-19-505869-0.
- Yanow, Scott (2008). "Thelonious Monk" biography, AllMusic.
- Williams, Martin (1 January 1992). "What Kind of Composer Was Thelonious Monk?". The Musical Quarterly 76 (3): 433–441. doi:10.1093/mq/76.3.433.
Further reading 
- Patrick, James S. (1975). "Charlie Parker and the Harmonic Sources of Bebop Composition: Thoughts on the Repertory of New Jazz in the 1940s". Journal of Jazz Studies 2: 3–23.
- Baker, David (1988). "The Contrafact". How to Play Bebop 3. Alfred Music Publishing. pp. 1–4. ISBN 978-0-7390-2182-8.
- Jazz Resource Library | Glossary at Jazz in America[dead link]
- Helzer, Richard A. (2004). "Cultivating the Art of Jazz Composition" at the Wayback Machine (archived September 28, 2007), iaje.com.