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In music, an octet is a musical ensemble consisting of eight instruments or voices, or a musical composition written for such an ensemble. ==Octets in classical music== Octets in classical music are one of the largest groupings of chamber music. Although eight-part scoring was fairly common for serenades and divertimenti in the 18th century, the word "octet" only first appeared at the beginning of the 19th century, as the title of a composition by Prince Louis Ferdinand of Prussia, whose Octet op. 12 (published posthumously in 1808) features the piano, together with clarinet, 2 horns, 2 violins, and 2 cellos. Later octets with piano were written by Ferdinand Ries (op. 128, 1818, with clarinet, horn, bassoon, violin, viola, cello, and double bass), Anton Rubinstein (op. 9, 1856, with flute, clarinet, horn, violin, viola, cello, and double bass), and Paul Juon (Chamber Symphony, op. 27, 1907) . Octets tend to be scored in one of the following arrangements: * String octet – This arrangement is made up entirely of strings. Felix Mendelssohn's Octet Op. 20 is an example, as are the octets of George Enescu and Dmitri Shostakovich. * * Double quartet – Double quartets are made up of two string quartets, often arranged antiphonally. Louis Spohr composed four such octets between 1823 and 1847 (opp. 65, 77, 87 and 136), taking as a model a work by Andreas Jakob Romberg. Later examples in this mode include works by Nikolay Afanas'yev (''Housewarming'' and ''Le souvenir'') and Mario Peragallo (''Music for Double Quartet'', 1948), as well as Darius Milhaud's paired 14th and 15th String Quartets op. 291 (1948–49), which are composed to be playable simultaneously as an octet . * * Cello octet – Eight cellos, a combination popularized by Heitor Villa-Lobos in his ''Bachianas brasileiras'' nos. 1 (1930) and 5 (1938/1945), though technically these are for "cello orchestra" with a minimum of eight players. Villa-Lobos also arranged three of the preludes and four fugues from Johann Sebastian Bach's ''Well-Tempered Clavier'' for this ensemble. Several all-cello groups came into existence during the late 1970s and 1980s, notably the Yale Cellos, the 12 Cellists of the Berlin Philharmonic, and the Conjunto Ibérico cello octet, and their popularity caused a surge of interest in cello-ensemble writing among composers. Some of the most prominent to compose cello octets include Luciano Berio (''Korót'', 1998), Sylvano Bussotti (''Poèsies à Maldoror'', 1999), Edison Denisov (''Hymne'', 1995), Morton Gould (''Cellos'', 1984), Sofia Gubaidulina (''Fata morgana: die tanzende Sonne'', 2002), Gordon Jacob (Cello Octet, 1981), Arvo Pärt (version of ''Fratres'', (1983), Steve Reich (''Cello Counterpoint'', 2003), Kaija Saariaho (''Neiges'', 1998), and Peter Sculthorpe (''Chorale'', 1994). * Wind octet – Usually scored for 2 oboes, 2 clarinets, 2 horns, and 2 bassoons; Mozart and Beethoven composed for this scoring, also known as Harmonie , though only Beethoven actually titled his one work for this grouping "Octet". The octets of Franz Lachner (Op. 156), Theodore Gouvy (Op. 71) and Carl Reinecke (Op. 216) are scored for flute, oboe, 2 clarinets , 2 horns and 2 bassoons. Igor Stravinsky's Octet for wind instruments has an unusual scoring of flute, clarinet, two bassoons, two trumpets, and two trombones. George Antheil's Concerto for Chamber Orchestra is scored for an octet of flute, oboe, clarinet, bassoon, contrabassoon, horn, trumpet and trombone. * Wind and string octet – a combination of forces, popularized by Franz Schubert (whose Octet is for clarinet, bassoon, horn, 2 violins, viola, cello, and double bass). A number of ensembles have been formed with this instrumentation, including the Octuor de Paris, for whom Iannis Xenakis composed ''Anaktoria'' (1969). By contrast, the Octet by Louis Spohr is scored for clarinet, 2 horns, violin, 2 violas, cello, and double bass. Paul Hindemith wrote a less well-known piece for clarinet, bassoon, horn, violin, two violas, cello and double bass. Another important 20th-century octet for winds and strings is ''Octandre'' by Edgard Varèse (1923), for flute (doubling piccolo), oboe, clarinet (doubling E clarinet), bassoon, horn, trumpet, trombone, and double bass . Alec Wilder composed a series of crossover octets between 1938 and 1940 which are scored for a quintet of woodwinds (flute, oboe, clarinet, bass clarinet, bassoon) backed by a rhythm section of harpsichord, double bass and drums. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Octet (music)」の詳細全文を読む スポンサード リンク
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