Duane Allman of The Allman Brothers Band lived to play music. A new box set, Skydog, collects the legendary body of work he produced before his death in 1971. John Gellman/Courtesy of the artist hide caption

itoggle caption John Gellman/Courtesy of the artist

Muddy Waters pioneered Chicago's now-signature electric blues. Keystone/Getty Images hide caption

itoggle caption Keystone/Getty Images