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In page Music of the Democratic Republic of the Congo:

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Like much of Africa, Congo was dominated during the World War II-era by rumba, a fusion of Latin and African musical styles that came from the island of Cuba. Congolese musicians appropriated rumba and adapted its characteristics for their own instruments and tastes. In the 1950s, record labels began appearing, including CEFA, Ngoma, Loningisa and Opika, each issuing many 78 rpm records; Radio Congo Belge also began broadcasting during this period. Bill Alexandre, a Belgian working for CEFA, brought electric guitars to the Congo.