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Accordion
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====Right-hand keyboard systems==== Different systems exist for the right-hand keyboard of an accordion, which is normally used for playing the melody (while it can also play chords). Some use a [[button (control)|button]] layout arranged in one way or another, while others use a [[piano]]-style keyboard. Each system has different claimed benefits<ref name="pianovschromatic">{{cite web|url=http://home.swipnet.se/nydana/accordiontest.pdf|author=Dan Lindgren |title=Piano Accordion vs. Chromatic Button Accordion|archive-url=https://web.archive.org/web/20090318050921/http://home.swipnet.se/nydana/accordiontest.pdf |archive-date=18 March 2009}}</ref> by those who prefer it. They are also used to define one accordion or another as a different "type": * [[Chromatic button accordion]]s and the [[bayan (accordion)|bayan]], a Russian variant, use a buttonboard where notes are arranged [[chromatic]]ally. Two major systems exist, referred to as the B-system and the C-system (there are also regional variants). Rarely, some chromatic button accordions have a decorative right-hand keyboard in addition to the rows of buttons, an approach used by the virtuoso accordionist [[Pietro Frosini]]. * [[Diatonic button accordion]]s use a buttonboard designed around the notes of [[diatonic scales]] in a small number of keys. The keys are often arranged in one row for each key available. Chromatic scales may be available by combining notes from different rows. The adjective "diatonic" is also commonly used to describe bisonic or bisonoric accordions—that is, instruments whose right-hand (and in some instances even bass) keys each sound two different notes depending on the direction of the bellows (for instance, producing major triad sequences while closing the bellows and dominant seventh or 7–9 while opening). Such is the case, for instance, with the Argentinian [[bandoneon]], the Slovenian-Austro-German [[Steirische Harmonika]], the Czech Heligonka Harmonika, the Italian [[organetto]], the Swiss [[Schwyzerörgeli]] and the [[Anglo concertina]]. * [[Piano accordion]]s use a [[musical keyboard]] similar to a piano, at right angles to the cabinet, the tops of the keys inward toward the bellows. **The rarely used bass accordion has only a right-hand keyboard, with ranks of 8', 16', and 32' reeds, with the lowest note being the deepest pitch on a pipe organ [[pedal keyboard]] (pedal C). It is intended for performing [[bassline]]s in accordion orchestras. **The rarely used piccolo accordion also has only a right-hand keyboard. * [[Jankó keyboard|6-plus-6]] accordions use a buttonboard with three rows of buttons in a "uniform" or "whole-tone" arrangement, generally known as a [[Jankó keyboard]]. The chromatic scale consists of two rows. The third row is a repetition of the first row, so there is the same fingering in all twelve scales. These accordions are produced only in special editions e.g. the ''logicordion'' produced by [[VEB Klingenthaler Harmonikawerke|Harmona]]. <gallery> Italian Button Accordion QM r.jpg|A button key accordion made by the company Marrazza in Italy. It was brought by Italian immigrants to Australia as a reminder of their homeland. PianoAccordeon.jpg|A ''Weltmeister'' piano accordion by [[VEB Klingenthaler Harmonikawerke]] </gallery>
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