In music, instrumentation is the particular combination of musical instruments employed in a composition, and the properties of those instruments individually. Instrumentation is sometimes used as a synonym for orchestration. This juxtaposition of the two terms was first made in 1843 by Hector Berlioz in his Grand traité d’instrumentation et d’orchestration modernes, and various attempts have since been made to differentiate them. Instrumentation is a more general term referring to an orchestrator's, composer's or arranger's selection of instruments in varying combinations, or even a choice made by the performers for a particular performance, as opposed to the narrower sense of orchestration, which is the act of scoring for orchestra a work originally written for a solo instrument or smaller group of instruments (Kreitner et al. 2001).
Writing for any instrument requires a composer or arranger to know the instrument's properties, such as:
- the instrument's particular timbre, or range of timbres;
- the range of pitches available on the instrument, as well as its dynamic range;
- the constraints of playing technique, such as length of breath, possible fingerings, or the average player's stamina;
- the relative difficulty of particular music on that instrument (for example, repeated notes are much easier to play on the violin than on the piano; while trills are relatively easy on the flute, but extremely difficult on the trombone);
- the availability of special effects or extended techniques, such as col legno playing, fluttertongue, or glissando;
- the notation conventions for the instrument.
Whereas ‘orchestration’ refers to the deployment and combination of instruments in large ensembles, ‘instrumentation’ is a wider term that also embraces the ingenuity of composers and arrangers in the handling of small ensembles. J.S.Bach experimented with a variety of instrumental groups throughout his composing life. A striking example is the band that he selected to accompany the solo bass singer in the “Quoniam” movement from his Mass in B minor.
According to George Stauffer, “The ‘Quoniam’ is one of Bach's most extraordinary arias. The setting—bass voice, horn, two bassoons and continuo—is unique in his oeuvre. Indeed, one is hard pressed to ﬁnd the combination elsewhere in the Baroque repertory" (Stauffer 2003, 89).
The haunting second movement of Schubert’s Trio in E flat exemplifies the variety and interest that is possible with just three instruments. Writing of this movement Charles Rosen (1997, 92) speaks of how Schubert “often concentrated, not on the motif, but on the space outlined by the motif, rearranging the elements within that space in different permutations." The movement opens with the main theme played on the ‘cello with the piano providing a trudging accompaniment consisting of repeated chords:
When the theme repeats a few bars later, these roles are exchanged. The piano plays the melody in octaves, while the ‘violin and cello play the accompaniment:
Later in the movement, the piano plays both the theme in the right hand and the accompaniment in the left, leaving the violin and ‘cello free to provide decorative countermelodies:
The concluding bars of the movement ring the changes in instrumentation yet again, adding further ideas, such as the falling octave figure in the first and final bars, while varying and enriching the harmony and instrumental color. The strings here accompany the piano playing pizzicato, before returning to their bows for the deeply expressive final bars:
A complete performance of the entire movement can be heard here.
Other works featuring distinctive instrumentation
- Rossini Petite messe solennelle (1863): twelve singers, two pianos and harmonium;
- Saint-Saens The Carnival of the Animals (1886): flute, clarinet, glockenspiel, xylophone, 2 violins, viola, cello, double bass and two pianos;
- Debussy Sonata for flute, viola, and harp (1915);
- Stravinsky, The Soldier’s Tale (1918): cornet, trombone, clarinet, bassoon, violin, double bass and percussion;
- Villa-Lobos Chôros No. 4 (1926): three horns and trombone;
- Bartók Sonata for Two Pianos and Percussion (1937);
- Messiaen, Fête des belles eaux (1937): six ondes Martenot; Quatuor pour la fin du temps (1941): clarinet, violin, cello and piano;
- Stockhausen Kreuzspiel (1951): oboe, bass clarinet, piano and four percussionists;
- Cage Imaginary Landscape No. 4 (March No. 2) (1951): 12 radios, 24 players;
- Boulez Le Marteau sans maître (1955): alto flute, viola, vibraphone, xylorimba, guitar and percussion; Sur Incises (1996–98): three pianos, three harps, and three percussionists;
- Goeyvaerts De Zang van Aquarius (The Song of Aquarius): eight bass clarinets.
- Kreitner, Kenneth, Mary Térey-Smith, Jack Westrup, D. Kern Holoman, G. W. Hopkins, Paul Griffiths, and Jon Alan Conrad (2001). "Instrumentation and Orchestration". The New Grove Dictionary of Music and Musicians, second edition, edited by Stanley Sadie and John Tyrrell. London: Macmillan Publishers.
- Randel, Don (1986). The New Harvard Dictionary of Music, pp. 397, 575–577. Cambridge: Harvard University Press. ISBN 0-674-61525-5 (hc).
- Rosen, Charles (1997). "Schubert’s Inflections of Classical Form". In The Cambridge Companion to Schubert, edited by Christopher H. Gibbs, 72–98. Cambridge and New York: Cambridge University Press. ISBN 978-0-521-48424-4.
- Stauffer, George B. (2003). Bach, the Mass in B Minor: The Great Catholic Mass. New Haven and London: Yale University Press.
|Wikisource has the text of the 1911 Encyclopædia Britannica article Instrumentation.|
- Addler, J. Instrumentation.
- Berlioz, Hector (1948). Treatise on Instrumentation, Enlarged and Revised by Richard Strauss, Including Berlioz' Essay "On Conducting", translated by Theodore Front. New York: E. F. Kalmus.
- Blatter, Alfred (1997). Instrumentation and Orchestration, second edition. New York: Schirmer Books.
- Borch, Gaston (1918). Practical Manual of Instrumentation. Boston: The Boston Music Company.
- Prout, Ebenezer (1877). A Treatise on Instrumentation: A Practical Guide to Orchestration .