Audio Post Production Knowledge Base

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

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Wow
All recorded media are designed to play back at specific, stable rates of speed. If the record or playback speed fluctuates, random variations in the pitch of the program, called wow, will result. Wow is inherent in any mechanical transfer, though in an optimal transfer, it should be so minor as

Bias
Bias is a very high frequency signal that is incorporated in the recording of any magnetic medium. Magnetic recording equipment generates a bias current that is required to enable the magnetic oxide to record the audio portion of a signal - somewhat like an audio catalyst. The signal generated

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