One of the best reissuers out there, Shellachead, put out a wonderful collection of Sudanese music last month, all 45s recorded on Sudan's Munisphone label in the sixties and seventies. I was only familiar with two of the artists previously, the fabulous female trio al-Bilabil (read about them here) and Sayed Khalifa, who is most well-known in Egypt, at least, for his song "Mambo Soudani," which he performs in the 1957 film Tamr Hinna.
And here is a bit of info about Khalifa, courtesy Heather Maxwell of the VOA:
His most famous song, and one of the Sudan’s most well travelled melodies, is ‘El Mambo Soudani’. The music was composed by Sayed Abdel Ray, and Sayed Khalifa himself composed the lyrics. This song has become a staple of Sudanese wedding bands, and was also the title of the 1998 Piranha records ‘El Mambo Soudani’ by the Cairo based group Salamat (Sayed Khalifa appears on the group’s 1998 CD ‘Ezzayakoum’). After encouraging his listeners to dance the Sudanese Mambo, Sayed Khalifa sings of his beloved, of her beauty and graceful silhouette, and of the suffering she puts him through.
But the other tracks on the collection are all worth listening to. You can listen to the entire collection here, via bandcamp, and you can download it for the very reasonable price of $5. (Plus you get the booklet that goes along with the music, as a pdf.) Highly recommended.