''Partiels'' is a 1975

music composition Musical composition can refer to an original piece or work of music, either vocal or instrumental, the structure of a musical piece or to the process of creating or writing a new piece of music. People who create new compositions are called ...

by French composer

Gérard Grisey Gérard Henri Grisey (; ; 17 June 1946 – 11 November 1998) was a twentieth-century French composer of contemporary classical music. His work is often associated with the Spectralist Movement in music, of which he was a major pioneer. Biograp ...

. Written for 18 instruments, the piece is considered a defining work of

spectral music Spectral music uses the acoustic properties of sound – or sound spectra – as a basis for composition. Definition Defined in technical language, spectral music is an acoustic musical practice where compositional decisions are often inform ...

. Many second- and third-generation spectral composers cite ''Partiels'' as causing their initial interest in the spectral outlook. It is the third piece in Grisey's cycle, ''Les Espaces Acoustiques.'' The opening of ''Partiels'' is derived from an electronic sonogram

analysis Analysis (: analyses) is the process of breaking a complex topic or substance into smaller parts in order to gain a better understanding of it. The technique has been applied in the study of mathematics and logic since before Aristotle (38 ...

of the attack of a low E2 on a

trombone The trombone (, Italian, French: ''trombone'') is a musical instrument in the Brass instrument, brass family. As with all brass instruments, sound is produced when the player's lips vibrate inside a mouthpiece, causing the Standing wave, air c ...

. This

spectrum A spectrum (: spectra or spectrums) is a set of related ideas, objects, or properties whose features overlap such that they blend to form a continuum. The word ''spectrum'' was first used scientifically in optics to describe the rainbow of co ...

is orchestrally synthesized through the assignment of different instruments to each

harmonic partial In physics, acoustics, and telecommunications, a harmonic is a sinusoidal wave with a frequency that is a positive integer multiple of the ''fundamental frequency'' of a periodic signal. The fundamental frequency is also called the ''1st harmo ...

in such a way as to harmonically and gesturally model the dynamic temporal evolution of the attack. Thus the opening features the successive entrance of lower partials with the fifth and ninth partials being louder than lower ones, including the fundamental, and all higher partials gradually trailing off in

amplitude The amplitude of a periodic variable is a measure of its change in a single period (such as time or spatial period). The amplitude of a non-periodic signal is its magnitude compared with a reference value. There are various definitions of am ...

. Each partial is approximated to the nearest

quarter tone A quarter tone is a pitch halfway between the usual notes of a chromatic scale or an interval about half as wide (orally, or logarithmically) as a semitone, which itself is half a whole tone. Quarter tones divide the octave by 50 cents each, a ...

. A low bass reinforces the fundamental an

octave In music, an octave (: eighth) or perfect octave (sometimes called the diapason) is an interval between two notes, one having twice the frequency of vibration of the other. The octave relationship is a natural phenomenon that has been referr ...

lower on the open E1 string. ''Partiels'' also makes use of sum and

difference tone A combination tone (also called resultant tone or subjective tone)Combination Tone
, ''Britanni ...

s to create harmonies.

Instrumentation

''Partiels'' is written for the following 18 instruments: : 2

flutes The flute is a member of a family of musical instruments in the woodwind group. Like all woodwinds, flutes are aerophones, producing sound with a vibrating column of air. Flutes produce sound when the player's air flows across an opening. In th ...

(1st doubling

piccolo The piccolo ( ; ) is a smaller version of the western concert flute and a member of the woodwind family of musical instruments. Sometimes referred to as a "baby flute" or piccolo flute, the modern piccolo has the same type of fingerings as the ...

and

alto flute The alto flute is an instrument in the Western concert flute family, pitched below the standard C flute and the uncommon flûte d'amour. It is the third most common member of its family after the standard C flute and the piccolo. It is chara ...

; 2nd doubling piccolo) : 1

oboe The oboe ( ) is a type of double-reed woodwind instrument. Oboes are usually made of wood, but may also be made of synthetic materials, such as plastic, resin, or hybrid composites. The most common type of oboe, the soprano oboe pitched in C, ...

(doubling

English horn The cor anglais (, or original ; plural: ''cors anglais''), or English horn (mainly North America), is a double-reed woodwind instrument in the oboe family. It is approximately one and a half times the length of an oboe, making it essentially ...

) : 2

clarinet The clarinet is a Single-reed instrument, single-reed musical instrument in the woodwind family, with a nearly cylindrical bore (wind instruments), bore and a flared bell. Clarinets comprise a Family (musical instruments), family of instrume ...

s in B (1st doubling clarinet in E; 2nd doubling

clarinet in A The clarinet is a single-reed musical instrument in the woodwind family, with a nearly cylindrical bore and a flared bell. Clarinets comprise a family of instruments of differing sizes and pitches. The clarinet family is the largest woodwin ...

) : 1

bass clarinet The bass clarinet is a musical instrument of the clarinet family. Like the more common Soprano clarinet, soprano B clarinet, it is usually pitched in B (meaning it is a transposing instrument on which a written C sounds as B), but it plays no ...

(doubling

contrabass clarinet The contrabass clarinet (also pedal clarinet, after the pedals of pipe organs) and contra-alto clarinet are the two largest members of the clarinet family that are in common usage. Modern contrabass clarinets are transposing instruments pitche ...

) : 2

horns Horns or The Horns may refer to: * Plural of Horn (anatomy) * Plural of Horn (instrument), a group of musical instruments all with a horn-shaped bells * The Horns (Colorado), a summit on Cheyenne Mountain * Horns (novel), ''Horns'' (novel), a dar ...

: 1

accordion Accordions (from 19th-century German language, German ', from '—"musical chord, concord of sounds") are a family of box-shaped musical instruments of the bellows-driven free reed aerophone type (producing sound as air flows past a Reed (mou ...

(or

electric organ An electric organ, also known as electronic organ, is an electronic keyboard instrument which was derived from the harmonium, pipe organ and theatre organ. Originally designed to imitate their sound, or orchestral sounds, it has since develop ...

) : 2

percussionists A percussion instrument is a musical instrument that is sounded by being struck or scraped by a beater including attached or enclosed beaters or rattles struck, scraped or rubbed by hand or struck against another similar instrument. Ex ...

: 2

violin The violin, sometimes referred to as a fiddle, is a wooden chordophone, and is the smallest, and thus highest-pitched instrument (soprano) in regular use in the violin family. Smaller violin-type instruments exist, including the violino picc ...

s : 2

viola The viola ( , () ) is a string instrument of the violin family, and is usually bowed when played. Violas are slightly larger than violins, and have a lower and deeper sound. Since the 18th century, it has been the middle or alto voice of the ...

s : 1

cello The violoncello ( , ), commonly abbreviated as cello ( ), is a middle pitched bowed (sometimes pizzicato, plucked and occasionally col legno, hit) string instrument of the violin family. Its four strings are usually intonation (music), tuned i ...

: 1

contrabass Contrabass (from ) refers to several musical instruments of very low pitch—generally one octave below bass register instruments. While the term most commonly refers to the double bass (which is the bass instrument in the orchestral string family ...

In the "''Nomenclature''" section of the score, Grisey indicates the possibility of performing the piece with only one horn player and one percussionist.Grisey 1976, ''Nomenclature''

Notes

References

* Fineberg, Joshua
''Spectral music : history and techniques''
(Overseas Publishers Association, published by license under the Harwood Academic Publishers imprint, ©2000)

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