Piano keys and chromatic buttons offer different ways of reaching the notes. In both types of accordion, the bellows supply air and shape the musical phrase, bringing melody together with bass and chords. 🏷️ INSTRUMENT PROFILE Name Accordion; German Akkordeon , Italian fisarmonica . Instrument family A free-reed aerophone supplied with air by hand-operated bellows. Its keys or buttons also place it among keyboard instruments in practical classifications. Sound production Airflow sets metal reed tongues into vibration. The reeds are mounted on plates inside the instrument. Controls Two separate keyboards or buttonboards sharing one set of bellows, through which the player supplies air and shapes the sound. Main components Right- and left-hand bodies, bellows, keyboards, reeds and reed blocks, valves, action mechanisms, register switches and supporting straps. Principal types Piano accordion, chromatic button accordion and diatonic accordion. The bayan ...