Since recording in the 1970s and '80s, Nigerian William Onyeabor has dropped off the music map. Courtesy of the artist hide caption

itoggle caption Courtesy of the artist

Violinist Isabelle Faust. Courtesy of the artist hide caption

itoggle caption Courtesy of the artist

Who Is William Onyeabor? is being released by the Luaka Bop record label. It comes out Oct. 29. Courtesy of the artist hide caption

itoggle caption Courtesy of the artist