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Franz Schubert's ''Impromptus'' are a series of eight pieces for solo piano composed in 1827. They were published in two sets of four impromptus each: the first was published in the composer's lifetime as Op. 90, and the second was published posthumously as Op. posth. 142. They are now catalogued as D. 899 and D. 935 respectively. They are considered to be among the most important examples of this popular early 19th-century genre.〔Ham, Ina (2005). (Franz Schubert’s Impromptus D.899 and D.935: An Historical and Stylistic Study )〕 Three other unnamed piano compositions (D. 946), written in May 1828, a few months before the composer's death, are known as both ''Impromptus'' and ''Klavierstücke'' ("piano pieces"). The ''Impromptu''s are often considered companion pieces to the ''Six moments musicaux'', and they are often recorded and published together. It has been said that Schubert was deeply influenced in writing these pieces by the ''Impromptus'', Op. 7 (1822) of Jan Václav Voříšek and by the music of Voříšek's teacher Václav Tomášek.〔''Grove Dictionary of Music and Musicians'', 5th ed. 1954〕〔(Naxos )〕 ==Four Impromptus, D. 899 (Op. 90)== The Opus 90 impromptus consist of 4 typical Romantic-era pieces, each with distinct elements. The name Impromptus was given by the publisher. 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「Impromptus (Schubert)」の詳細全文を読む スポンサード リンク
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