Shout! Factory continues its campaign of archival ELP live releases with Live at the Mar Y Sol Festival '72, the first-ever official release of this legendary concert. With Keith Emerson on keyboards, Greg Lake on bass and vocals and Carl Palmer on drums, ELP broadened the audience for progressive rock. The band released a series of landmark albums in the 1970s, and several more in the '90s after a 14-year hiatus.