Def Leppard's music is a steady-enough presence on the radio that the band members never have been too far removed from hearing the songs the way they recorded them.
Old live performances, though, are a different story. A recently released expanded deluxe edition of the band's 1983 album "Pyromania," for example, includes a bonus disc of music from a show that year at the Forum in Los Angeles.
"We played 'Photograph' probably twice as fast as we play it now," guitarist Phil Collen says by phone from outside a Starbucks in Cleveland. "It was all excitement, piss-and-vinegar. It was our first headline tour."