Although they were probably the band that most transformed rock from a singles medium to an album-oriented form, the Beatles also released many singles and EP tracks that never made it onto albums. In the U.S., Capitol turned the group's early LPs, through Sgt. Pepper's Lonely Hearts Club Band, into compilations, more or less, throwing the hit singles onto the vinyl to augment the album tracks. When the label later released the U.K. albums on CD, it posed a problem: What to do with the non-LP singles? Past Masters, Volume 1 compiles 18 of those singles, including some of their best-known tracks, running from "Love Me Do,""She Love You,""I Want to Hold Your Hand," and "This Boy" to "I Feel Fine" and Paul's homage to Little Richard, "I'm Down." Essential stuff. --Bill Holdship