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

Between 2006 and 2010, Jason Hamacher made many trips to Syria to photograph and record ancient chants. Jason Hamacher/Lost Origins Productions hide caption

itoggle caption Jason Hamacher/Lost Origins Productions

About 350 musicians and even more spectators gathered on the steps of the Brooklyn Public Library on June 21 for the NPR Music-commissioned premiere of Sunny Jain's 100+ BPM. Polina Yamshchikov for NPR hide caption

itoggle caption Polina Yamshchikov for NPR