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Audio Post Production Knowledge Base
Welcome to TriggerTone — the searchable online guide to audio post production terminology.
For more than a century, those who work with audio have developed a vocabulary all their own - a lexicon where cans are worn over your ears, clipping has nothing to do with coupons, bias never refers to favoritism, sweetening contains no sweetener, a matrix does not star Keanu Reeves, and "wow" is one thing you never want to hear.
TriggerTone signals the start of your search through the multitude of terms used in audio post. Curious why motor boating has sunk your track or how an anomaly with a name as innocuous sounding as flutter could cause so many rejections? The definitions herein were written for professionals not necessarily familiar with the physics of sound or the mind numbing details of an audio engineering textbook. Rather, the goal of TriggerTone is to provide concise, clear interpretations of terms as they relate to audio post embellished with sound clips and illustrations where helpful.
The gate is open; soon your head will be filled. To get you started, please remember that in the world of sound you do not need to layback to laydown, and you absolutely can not eat the pancakes.
Browse the most popular viewed terms.
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Sync-pop |
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17.5mm Film |
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Lt/Rt |
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Optical Sound Track |
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Foley |
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DAT |
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data
equipment
archival
technologies
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 
Azimuth Errors
Azimuth is the vertical alignment in the plane of the tape path along the record and playback heads of a tape machine or mag dubber. Azimuth issues are timing issues due to the alignment of the tape against the head. Before recording or playing back tape or film, azimuth adjustment is applied
Conform
Conforming, also known as synchronization, is the act of placing audio in a matching time reference with picture so that sound coincides with image. Picture and sound are usually recorded separately, and even if they are recorded to the same tape at the same time, they will need to be separated in