Distortion caused by one signal beating with another signal and producing frequencies that are both the sum and the difference of the original frequencies.
Electret Mic
A condenser microphone where the capacitor plates are given a charge during manufacture which they retain, therefore requiring no external power supply.
Brooks XB 33 House Sync
A synchronization signal such as SMPTE time code that is used by all recorders in the control room.
LED
A light that allows current to flow in one direction only and emits light whenever a voltage of a certain level or beyond is applied to it.
Brooks TM-22 Hum
The 60 Hz power line current accidentally induced or fed into electronic equipment.
Crisp
Describes a good clean high midrange sound. It can be good or bad depending on the look on the face of the guy who said it.
Centre Frequency
The frequency of the audio signal that is boosted or attenuated most by an equalizer with a peak equalization curve.
Condenser
An older term meaning the same thing as Capacitor (an electronic device which is composed of two plates separated by an insulator and can store charge) but sill in common use when referring to a microphone's active element.
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