Amica 4 voices acordeon. F - tune. 37 keys, 96 bass buttons. More accordion for creative performances. Who does not want greater choice of timbres to move freely around the whole wide world of accordion music?The added fourth voice in the Amica 4-voice models brings 11 different timbres into existence. This makes it perfect for use in orchestras as well as on stage in keeping with the standard of all HOHNER accordions.