American rock Building Sound and the polished production values of soul, have been seen as influencing the Merseybeat sound, particularly the early work of The Beatles, and through them and others the form of later rock music. Some historians of music have also pointed to important and innovative technical developments that built on rock and roll in this period, particularly the Wall of Sound pursued by Phil Spector. Commentators have traditionally perceived a decline of rock and roll in the late 1950s and early 1960s. By 1959, the death of Buddy Holly, The Big Bopper and Ritchie Valens in a plane crash,
Ritchie Valens In Concert at Pacoima Jr. High was taped using a small portable tape recorder. After Valens' untimely death on February 3, 1959, numerous Ritchie Valens Fan Clubs were formed all over the nation. By late 1960, with no further records released since the "Ritchie" album a year before, his manager Robert Keane received letters en masse from fan club members who were hoping there were more of Valens' songs to be released. Keane responded by obtaining the tape of four songs from the Pacoima Junior High show and pressing it to record. To fill the "live" side of the album, an early demo of "Come On,