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An impromptu (, , loosely meaning "offhand") is a free-form musical composition with the character of an ''ex tempore'' improvisation as if prompted by the spirit of the moment, usually for a solo instrument, such as piano. According to Allgemeine musikalische Zeitung, Johann Baptist Cramer began publishing piano pieces under the (sub-)title of "impromptu." (AMZ, Mar. No II, 1815, col. 6), which seems to be the first recorded use of the term ''impromptu'' in this sense. ==Form usage== Since the very concept of unpremeditated, spur-of-the-moment inspiration without studied care is at the heart of Romantic artistic theory, it did nоt take long before the first generation of Romantic composers took up the idea. Others were: * Jan Václav Voříšek was the first one to compose impromptus published under that title, in 1822. * Franz Schubert published two sets of four ''Impromptus'' for piano op. 90 and 142 (1827). After his death 3 more unnamed piano compositions (''Klavierstücke'') were sometimes named ''Impromptus''. * Frédéric Chopin composed 4 ''Impromptus'', including the famous Fantaisie-Impromptu. * Robert Schumann wrote some Impromptus, published as Op. 5. * Franz Liszt composed an Impromptu in F sharp (sometimes called Nocturne) and a piano piece named Valse-Impromptu. * Alexander Scriabin is known to have written at least nine impromptus for the piano in his early period. * Jean Sibelius composed six impromptus for piano op. 5 (1893) The impromptu genre remained popular all throughout the 19th century. In the 20th century, there are also several examples of composers naming their compositions "Impromptu", such as: * Gabriel Fauré composing six ''Impromptus'' between 1881 and 1913. * Richard Rodney Bennett composing five ''Impromptus'' for guitar in 1968 * Maurice Journeau composing six ''Impromptus'' between 1971 and 1974.〔(Journeau's works )〕 * Donald Martino composing ''Fantasies and Impromptu'' in 1980. * Nikolai Kapustin composing four ''Impromptus'' between 1991 and 1997. * Lowell Liebermann composing ''Three Impromptus Op.68'' in 2000. * Vince Mendoza's Epiphany, performed by the London Symphony Orchestra and published in 1999. The first piece of the album is named ''Impromptu''. * One of Queen's compositions, performed at Wembley Stadium and other performances is named ''Impromptu''. 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「impromptu」の詳細全文を読む スポンサード リンク
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