This 4CD set contains the complete master studio recordings of Elvis Presley from the 1950s. It includes personal acetates, cut in 1953 and early 1954, all of his early Sun recordings from 1954-55, as well as every RCA studio master and movie studio soundtrack recording made between January 1956 and June 1958. The set also contains bonus tracks of recordings made at radio stations, as well as alternate movie soundtrack recordings. All tracks have been professionally remastered to provide the best sound quality ever released.