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These almost always use distinct bass buttons and often have buttons with concavities or studs to help the player navigate the layout despite not being able to see the buttons while playing.There are three general categories: Inside the accordion are the reeds that generate the instrument tones.In describing/pricing an accordion, the first factor is size, expressed in number of keys on either side.
There is a wide range of instruments that are called accordion. Different systems exist for the right-hand manual of an accordion, which is normally used for playing the melody.
The performer normally plays the melody on buttons or keys on the right-hand , and the , consisting of bass and pre-set chord buttons, on the left-hand manual. In some countries (for example , and ) it is used in popular music (for example , and B-Pop in ), whereas in other regions (such as , and other countries in ) it tends to be more used for and and as well as in regional and is often used in in , and .
Nevertheless, in Europe and North America, also make use of the instrument.
The size and weight of an accordion varies depending on its type, layout and playing range, which can be as small as to have only one or two rows of basses and a single on the right-hand manual, to the standard 120-bass accordion and through to large and heavy 160-bass free-bass converter models. The manual mechanism of the instrument either enables the air flow, or disables it: A side view of the pallet mechanism in a piano accordion.
As the key is pressed down the pallet is lifted, allowing for air to enter the tone chamber in either direction and excite the reeds; air flow direction depends on the direction of bellows movement. The most typical accordion is the piano accordion, which is used for many musical genres.