This style of music comes from the Pedi people of Northern Transvaal (Limpopo province). In the 19th century missionaries introduced the Pedi to the autoharp. By the 1920s, the instrument was widely adopted into their music, and was known as the harepa. http://excavatedshellac.com/2009/11/02/tysons-autoharp-band-mnamkuruane/