Frank Zappa might be linked to rock music today, but that was never his intention when he started playing guitar in the late 1950s.

On the Mothers of Invention’s 1969 Uncle Meat, you can hear Frank Zappa exhort keyboardist Don Preston to climb up to the Royal Albert Hall’s majestic pipe organ and belt out the riff to Louie Louie.

Frank Zappa was as influential as he was divisive, which is to say, immensely. Despite the Rock and Roll Hall of Fame rejecting him twice for admission to its musical ranks during his lifetime, Zappa ...