If your primary frame of reference is “Hakuna Matata,” you maybe don’t realize that, for a few years in the ’70s, Elton John was MASSIVE—the biggest thing in music since the Beatles. And if a balding, bespectacled piano player seems an unlikely superstar, keep in mind that this was the fellow behind tunes like “Levon,” “The Bitch Is Back,” “All the Girls Love Alice,” and “Someone Saved My Life Tonight.” So let the sun come up on this chance to see him in his prime, with this rare recording of a 1976 Edinburgh concert.  NED LANNAMANN