Rock musicians owe much to the legendary classical composers that preceded them. For instance, J.S. Bach’s well-known “Orchestral Suite No. 3″ was the inspiration for British rock band Procol Harum’s debut single, “A Whiter Shade of Pale.” Hear this iconic piece of music, along with “Summer,” from Vivaldi’s “Four Seasons,” alongside the music of Led Zeppelin, the Beatles, and Jimi Hendrix.