Brooks Hi Fi speakers AC

1) Abbreviation for alternating current.
2) An abbreviation of the term Alternating Current (electric current which flows back and forth in a circuit; all studio signals running through audio lines are AC).

Automatic Gain Control (Automatic Volume Control)
A compressor with a very long release time used to keep the volume of the audio very constant.

Brooks HI FI projectors Envelope
1) How a sound or audio signal varies in intensity over a time span.
2) How a control voltage varies in level over time controlling a parameter of something other than gain or audio level.

Basic Session
The First session in recording an audio production to record the Basic Tracks.

Brooks RM 909 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.

Keyboard
1) Any musical instrument controlled by pressing a key.
2) The part of the computer that has the keys.

Band Track
1) A mixdown of a song without the lead vocal or without the lead and background vocals.
2) A term with the same meaning as the term Rhythm Track.
3) The recording of the rhythm instruments in a music production.

Harmonic Distortion
The presence of harmonics in the output signal of a device which were not present in the input signal.