Accordion: instrument music of wind, equipped with two boxes containing Tin, and as articulated by a bellows, aspire and expire the air that excites the tabs arranged in the joint bars of each Crown. All types of accordion are classified into closed and keyboards; the closed, equipped with buttons on the melodic expansion, recorded combinations of scales, chromatic, diatonic, and tempered, whereas in tonic extension chords of the accompaniments are recorded. All accordions are instruments of masculine gender, and always consist of mechanical devices called keys, but the accordion keyboards offer a soft extension ( 41 piano; It is issued a succession of melodic tempered, for the right hand in several octaves. Types of accordion: Concertina or keyboard piano, Bandoneon, chromatic closed ( 41 melodic buttons; and the Diatonic closed.