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(詳細はaccordion equipped with a right-hand keyboard similar to a piano or organ. Its acoustic mechanism is more that of an organ than a piano, as they are both wind instruments, but the term "piano accordion"—coined by Guido Deiro in 1910〔Henry Doktorski, ''The Brothers Deiro and Their Accordions'' (The Classical Free-Reed, Inc.: 2005)〕—has remained the popular nomenclature. It may be equipped with any of the available systems for the left-hand manual. In comparison with a piano keyboard, the keys are more rounded, smaller, and lighter to the touch. These go vertically down the side, pointing inward, toward the bellows, making them accessible to only one hand while handling the accordion.〔Felt or rubber is placed under the piano keys to control touch and key noise: it is also used on the ''pallets'' to silence notes not sounded by preventing air flow. This material eventually wears with use, resulting in a clacking noise, so has to be replaced to quieten the mechanism.〕 The bass piano accordion is a variation of a piano accordion without bass buttons and with the piano keyboard in an octave lower. They typically have around 3 octaves. == History == The first accordion to feature a piano keyboard was probably the instrument introduced in 1852 by Bouton of Paris.〔Joseph Macerollo, ''Accordion Resource Manual'', Avondale Press (1980), 17.〕 Another source claimed the first piano accordion was introduced in 1854 at the Allegemeine Deutsche Industrieausstellung in Munich. It was showcased by the instrument builder Mattäus Bauer and quickly became a serious competitor to button accordions.〔Bjarne Glenstrup, ''Harmonikaens Historie'' (1972), The University of Copenhagen (Faculty of Music), p. 41〕 The first chromatic piano-like accordions in Russia were built in 1871 by Nikolay Ivanovich Beloborodov.〔Fadeyev, I.G. and I.A. Kuznetsov. ''Remont garmonik, bayanov, i akkordeonov. Izdaniye 2-e, ispravlennoye i dopolnenoye.'' Moscow: Legkaya industriya, 1971. p.9-10.〕 In the United States, the piano accordion dramatically increased in popularity between 1900-1930 based on its familiarity to students and teachers, and its uniformity, whereby accordion dealers and instructors did not have to support different styles of accordions for many European immigrant groups. The piano keyboard layout was also promoted by the fame of Vaudeville performers Guido Deiro and his brother Pietro who premiered the instrument on stage, recordings and radio. After the Deiro's success, popular chromatic button accordionist Pietro Frosini chose to disguise his accordion's buttons to look like a piano keyboard so as not to appear "old-fashioned." 〔("Looks Like a Cash Register and Sounds Worse" ) ''The Deiro Brothers and the Rise of the Piano Accordion in American Culture 1908-1930'' by Peter C. Muir〕 (See Accordion music genres) The piano accordion is the official city instrument of San Francisco As of 1972 it could be largely said that the piano system dominated the English-speaking North American continent, Scotland, and certain East European countries, while differing button systems are generally to be found in Scandinavia, France, Belgium and former Soviet countries.〔Bjarne Glenstrup, ''Harmonikaens Historie'' (1972), The University of Copenhagen (Faculty of Music), p. 42〕 The piano accordion is also predominant in Italy, New Zealand, and Australia. 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「Piano accordion」の詳細全文を読む スポンサード リンク
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