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Post Production Video and Film SoundSound correction is probably more art than science. Watch a professional with "great ears" work a sound track, you will be in awe. Documentary video sound typically has at least three layers of sound -- ambient sound, a voice from an interview, and underscore music. EQ (equalization) alters frequency so voice-over audio tracks can stand above the ambient sound and underscore.
GIGO -> garbage in, garbage out
Make the Voice Stand Out
The human voice is in the low to mid ranges, and it can be boosted for enhancement. Hiss is high end stuff. Cut high end frequencies out and maybe the hiss will go away. But so will some of the life and brilliance of the sound. Therein lies the rub. A good mixing board can be used to 'notch' out a particular frequency and a good set of ears, of course, is needed to determine when it is helping and when it is detracting from the "sound quality."
The goal is for all your elements to have their own sonic space, which is done mainly with frequency -- ideally each element can have it's own part of the frequency spectrum.
Otherwise, sounds that fluctuate wildly in level might need to be compressed -- however -- too much compression makes things sound unnatural. Bumps cracks and other audio blemishes need to be removed. Most of the sound program I've seen have Equalization and compression.
Film Sound CommunitiesThese Forums are for audio enthusiasts -- lurking on these forums can result in valuable education experiences.
Film Sound LinksAudio FAQ
This FAQ answers many many commonly asked questions about all aspects of audio.
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