Music by guitarist Fields Ward appears in the new collection Work Hard, Play Hard, Pray Hard: Hard Time, Good Time & End Time Music, 1923-1936. Library of Congress Prints and Photographs Division hide caption

itoggle caption Library of Congress Prints and Photographs Division

Samuel Yirga plays Ethiopian standards with a voracious talent that helps him savor each musical flavor. Courtesy of the artist hide caption

itoggle caption Courtesy of the artist

The Analog Players Society was assembled by a producer and percussionist in his mid-30s who calls himself Amon. Courtesy of the artist hide caption

itoggle caption Courtesy of the artist

Boban i Marko Markovic Orkestar performs onstage in 2008. Roger Kisby/Getty Images hide caption

itoggle caption Roger Kisby/Getty Images

Hugh Masekela. courtesy of the artist hide caption

itoggle caption courtesy of the artist

El Rego, the godfather of Benin funk, and his band The Commandos. Courtesy of the artist hide caption

itoggle caption Courtesy of the artist