Saturday evening drinks with friends and the discussion turned to super 8mm sound films and the antiquity of producing the films compared to DVD's. One topic was the way in which the sound was put onto 8mm films and whether the process was the same as the 'old' cassette tapes where 'speed' recording was employed which greatly increased production but with a loss on sound quality. I couldn't answer as I didn't know. Can anyone throw any light onto this subject.