Steve Coleman practices in his backyard in Allentown, Penn. Jeff Fusco/Courtesy of the John D. and Catherine T. MacArthur Foundation hide caption

itoggle caption Jeff Fusco/Courtesy of the John D. and Catherine T. MacArthur Foundation

Bob Marley, seen here performing in Paris in 1980, died years before Legend was released. It has since sold millions of copies — and this week, it hit No. 5 on the Billboard chart. Guidot Lou/Dalle /Landov hide caption

itoggle caption Guidot Lou/Dalle /Landov

A group of Nile Project musicians play together at the Ndere Cultural Centre, Kampala, Uganda in January 2013. Left to right: Dina El Wedidi, Dafaalla El Hag, Lawrence Okello, Kasiva Mutua. Julie Caine hide caption

itoggle caption Julie Caine