857 Excellent presentation of the soundtrack on the 35mm film, and is similar with the soundtrack on the 16mm film as well. Later on, we added another track to the variable area to give out more dynamics and help reduce noise. The variable density had more noise since the light beam was continually going through a grey area even though there was no variable sound information. Then we came out with Dolby Stereo, version "A" -taking the two variable areas and giving them each a sound record to correspond to the left and right channels. Center channel was when left and right had the same information and the processor took this information as a mono record. Excellent history from the Britannica collection. Sound reproduction op712 2003-01-06 01:26:40 2003-01-06 01:26:40 5 Another dry EB film, with some interesting touches. This time, it's talking about how film is transferred on to motion pictures. While some of it is interesting, it mostly isn't. The things that got me were the voice of all those EB films finally having a face and the ending, but other than that, if you're not a techie nut wondering how film works, it's a snooze-through. Sounds like a nerd.. looks like one too! 3 Spuzz 2005-06-11 03:24:19 2005-06-11 03:24:19 Hi: I like using variable-density analog B&W monoaural negative [no positive and no "reversal"; just the negatives] film optical tracks for audio. The audio characteristics of the film make my mouth-water. Yes, for some wierd reason, the film's audio makes me hungry. Why didn't they make an audio-only equivalent of this for music [i.e. an optical audio tape]? Why not replace *Analog Magnetic Audio Tapes* with *Analog Optical Audio Tapes*?? Analog optical audio is used in films and sound better than analog magnetic audio. Magnetic tape contains static, humming, and other electromagnetic disruptions whereas optical tape does not. Optical tape is resistant to bar magnets whereas magnetic tape is not. Analog optical audio records and plays in the same manner as film does. The difference for me, is, I'd like to use only the negative film and no positive. Regards, Green Xenon Analog Optical Audio in films Green Xenon 2007-04-14 05:50:00 2007-04-14 05:50:00 5 3 4.33