one such thumb piano, the Mbunda "kathandi", the Lozi "kangombio", the Lunda "chisanzhi", the Nsenga "kalimba", etc. Although the use of traditional instruments has declined in recent years, they can still be heard in rural areas of Zambia. Recordings of traditional Zambian music were made in the mid-twentieth century by Hugh Tracey and Arthur Morris Jones, both well-known ethnomusicologists of African music. Tracey recorded all over Zambia in the 1950s, but also specifically recorded in the Zambezi Valley in 1958 at the request of anthropologist Elizabeth Colson before the creation of the Kariba Dam and Jones did his at Mapanza in Zambia's Southern Province. Catholic missionaries, J. J. Corbeil and Frank Wafer have also contributed to our knowledge of traditional Zambian music. Father Corbeil collected and documented the instrumental tradition of the Bemba in Northeastern Zambia. Frank Wafer, a Jesuit priest located at Chikuni, has collected and preserved Batonga music. A community radio station dedicated to promoting Batonga music and culture is also part of the Chikuni Mission Station. They organize an annual festival of Batonga music which attracts as many as 10,000 visitors according to the organizers. Recent ethnomusicological work has been done by native Zambians such as Mwesa Isaiah Mapoma, Joseph Ng'andu, John Anderson Mwesa and others. Recent field recordings made by native Zambian Michael Baird in Southern Province have been released on his SWP label, as well as producing two excellent compilations of Zambian hits from the 60s, 70s and 80s. Popular music After independence in 1964, the most important source of popular music was the Zambia Broadcasting Service and affiliated bands like Lusaka Radio Band who soon changed their name to The Big Gold Six. Record companies soon formed, with most recordings made at Peter Msungilo's DB Studios in Lusaka, and records pressed in Ndola by the Teal Record Company. The northern, copper-producing area of Zambia was known for singers like John Lushi, William Mapulanga and Stephen Tsotsi Kasumali. Their guitar-based music grew gradually into Zamrock, which used mostly English lyrics in rock songs. Bands included the Machine-Gunners and Musi-o-tunya. The most popular band in Zambian history soon emerged, Jaggari Chanda's Witch. In the late 1970s, President Kenneth Kaunda ordered that 95% of the music on the radio had to be Zambian. He hoped to encourage the formation of a Zambian national identity. Rather than using their folk roots, however, Zambians attempted to become pop stars.