A well known instrument, this type of ÒpianoÓ is used all over the Democratic Republic of Congo. Nearly every ethnic group created its own version. Sanzas have a varying number of keys, played in a variety of tunings. They are played with the thumbs... This wood sanza, of rectangular form, has iron keys. Sanzas are used all over the Congo, usually for entertainment rather than ritual purposes. They have a varying number of keys, played in a variety of tunings. The size of the box determines the resonat...