The modern form of wassoulou is a combination of hunter's songs with "sogoninkun", a type of elaborate masked dance, and the music is largely based on the "kamalengoni" harp invented in the late 1950s by Allata Brulaye Sidibí. Most singers are women. Oumou Sangaré was the first major wassoulou star; she achieved fame suddenly in 1989 with the release of "Moussoulou", both within Mali and internationally. Wasulu region of southwest Mali. The "soku" is a traditional Wassoulou single string fiddle, corresponding to the Songhai "n'diaraka" or "njarka", that doubles the vocal melody.