A well known instrument, this type of thumb piano 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 a notched edge, iron keys, and two holes on one end for hanging. 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 ...