Now, in time for the 45th anniversary of the album’s release, which is tomorrow, you can listen to his creation, Side 1 x 100. As that title suggests, Chang has overlaid just 100 copies, instead of several hundred; even so, the unique ways in which each copy has aged, plus “variations in the pressings” and “natural fluctuations in the speed of Mr. Chang’s analog turntable” result in a bizarre composition that builds from the familiar to the cacophonous. “Back in the U.S.S.R.” sounds about how you remember at first, if a bit muddy. But the storm of variation builds quickly, and by the end of “Dear Prudence” it’s as though you’re swirling around with a record player in the middle of a tornado.