When I saw PF do the Animals tour in 1977, there were animal sounds coming from all over the place. Dog sounds coming from different speakers unexpectedly to make it scary. Sheep in like a 3D effect coming from all around. Bird chirping sounds. With PF playing and David Gilmour's vocal repeating in the back channels "stone," or that well known effect. Overall, one of the best Quadraphonic mixes I ever heard. And this was at a time when you sort of knew Quad was being abandoned by the music industry. We didn't get "Animals" or Aerosmith's "Draw the Line" with the nice CBS Quadraphonic logo on the top center of the record cover. I did find 2 copies of BOC "Agents of Fortune," and bought one. But that's another story. That title is hopefully still in the CBS vaults. Anyway, sooner or later it sounds like we're going to get "Animals" in 5.1. Can't wait.