出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2016/02/13 06:08:24」(JST)
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Right-hand manual: F3 to A6 (scientific pitch notation) is the written range for the right-hand manual of a standard 120-bass/41-key piano accordion, three octaves plus a major third. Actual range sounds one octave lower and one octave higher (F2-A7) depending on stops chosen. Left-hand manual
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| Accordion, Chromatic button accordion, Bayan, Diatonic button accordion, Piano accordion, Stradella bass system, Free-bass system, Accordion reed ranks & switches | |
A piano accordion is an 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[1]—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.[notes 1]
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.
The first accordion to feature a piano keyboard was probably the instrument introduced in 1852 by Bouton of Paris.[2] 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.[3]
The first chromatic piano-like accordions in Russia were built in 1871 by Nikolay Ivanovich Beloborodov.[4]
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." [5] (See Accordion music genres) The piano accordion is the official city instrument of San Francisco[6]
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.[7] The piano accordion is also predominant in Italy, New Zealand, and Australia.
Compared to a chromatic button layout,[8] the advantages of using a piano layout on an accordion would be the layout's logical simplicity,[notes 2] the relative size of the buttons for fast legato flows, and its layout compared to standard notation.[notes 3] However, it has a smaller range, is too big to reach notes far apart, such as two octaves, requires more finger movement to operate, and requires learning twelve fingering patterns to play in every possible key, instead of three as on the chromatic button accordion.
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