Frank Zappa & The Mothers Of Invention, live at the Rockpile, Toronto, February 23rd, 1969. The Rockpile was Toronto's hippest club, and 4,000 of the city's hippest heads flocked there on February 23rd, 1969 to see the great Frank Zappa and his Mothers Of Invention. They did not disappoint, playing a remarkable set that combined their uniquely skewed take on rock n' roll with virtuoso solos and improvisations, as well as their trademark humorous interludes. Originally broadcast on CBC-FM, the entire broadcast is presented here, digitally remastered, with background notes and images.