3/9/2023 0 Comments Dolby atmos demo video 2015Although optical tracks are still available on every theatrical release film print, they are not generally used in the dubbing process any more. PEC stands for 'photo-electric cell', which was the original method of playing back the optical sound track on a film. This is where the term 'PEC/Direct' switching raises its head. Remember that the console automation and matching the positions of the faders everything had to be remembered (or marked with wax pencils on the fader escutcheons!) and the balance matched by ear. The problem is that at the point of the drop-in the old mix and the new mix have to be 100 percent identical, otherwise the mismatch would be audible, perhaps a click, or a gap. Consequently, it was necessary to have some means of dropping in to a mix just before the point where it all went horribly wrong, and then continue mixing until the next time it falls apart! The chances of mixing several dozen effects reels to produce the perfect premix in a single pass were pretty slim, even for the most experienced dubbing mixers. The Post module in the demo S6 on the Avid stand is an early prototype and he told me why the paddle controls are called PEC/Direct are all about.
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