Audio Post Production Knowledge Base

Today's Audio Term: Matrix When audio engineers matrix...

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Trigger Tone
A trigger tone is a 12kHz sine wave that was used to "trigger," or turn on, the surround channel of a discrete LCRS (Left channel, Center channel, Right channel, Surround channel) Cinemascope™ print. Early LCRS surround mixes for Cinemascope films contained very little surround

Vinegar Syndrome
Vinegar Syndrome is an indicator of a complex chemical process caused by the decomposition of the acetate film base of certain types of mags and audiotapes. Over time, this deterioration process yields acetic acid (or vinegar) as a pungent byproduct, giving this syndrome its distinctive odor and

Modulating Hiss
Modulating hiss refers to noise levels that noticeably rise and fall with program level. For example, a common occurrence of modulating hiss can be heard when noise levels rise around each spoken word of dialogue in a soundtrack.