Brooks Cinema Projectors Light Emitting Diode

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.

Bulk Dump
Short for System Exclusive Bulk Dump (a method of transmitting data, such as the internal parameters of a MIDI device to another MIDI device).

Brooks SS 81 Equal Loudness Contours
A drawing of several curves showing how loud the tones of different frequencies would have to be played for a person to say they were of equal loudness.

Effects
Electronic boxes (usually rack mounted) added to a PA system to subtly change and enhance the signals going through it. Examples include; Reverb, Delay, Compressor, Chorus.

Brooks Cinema TX 509 Flange
An effect caused by an approximately even mix of a modulated (varying) short delay with the direct signal.

Dry
Describes a sound coming from the PA with no effects on it.

Bi
A prefix meaning two.

Delay (Digital, Analogue)
1) Effect used to create echo…echo…echo…echo…echo…
2) In more advanced systems used in very large venues, delay can be used to time the arrival of the signal to the speakers in the back of the room so that people in the back hear the sound coming from those speakers at the same time that the sound coming from the speakers in the front of the room arrives.

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