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The area of the guitar at the end of the neck where the strings are tuned.

Foot Switch
A switch placed on the floor and pressed by a musician to do various functions.

Brooks GT 845 Level
The amount of signal strength; the amplitude, especially the average amplitude.

Auxiliary Input or Return
A route back into the sound desk for a signal sent to a piece of outboard equipment via an auxiliary send.

Brooks KM 22 Effects Track
1) In film production audio, a recording of the mixdown of all the sound effects for the film ready to be mixed with the dialogue and music.
2) In music recording, one track with a recording of effects to be added to another track of a multitrack recording.

Electromagnetic Induction or Pick Up
The generation of electrical signal in a conductor moving in a magnetic field or being close to a changing magnetic field.

Lift
1) To boost gain of audio at a particular band of frequencies with an equalizer.
2) An elevation device in the star trek series of TV programs.

High Frequencies
The audio frequencies from 6000 Hz and above.