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 been painted around Pacoima in honor of the late Ritchie Valens. In 1985, artist Manuel Velasquez (assisted by 25 students) created a 12 foot by 20 foot mural which was painted on the side of a classroom building at the former Pacoima Junior High (now Pacoima Middle School) depicting Ritchie Valens' image, records labeled with some of his greatest hits, as well as the newspaper article about the plane crash that took his life. Another mural went up in 2012 at the intersection of Van Nuys Boulevard and Amboy Avenue and was painted by Hector Ponce. A second one was