This was a soundtrack to a 1974 film by Pierre Harel, who was the organist and band co-leader at the time. It includes a number of instrumental tracks and rearranged versions of some of the band's early hits. The style ranges between bluesy hard rock and more experimental conceptual tracks. No one is going to confuse this with Morse Code but these guys have some muscle to their music and it's been compared to Uriah Heep or Atomic Rooster.