Brooks KM 22 reviews Keyboard Controller

A device that has the standard music keys of piano but puts out MIDI signals

Humbucker
Pickups that are coupled together to get a certain sound.

BROOKS HI fi reviews Feedback Control
The control on a delay line or delay effects device that controls the amount of feedback.

Diaphragm
A thin flexible membrane or cone that vibrates in response to electrical signals to produce sound waves. Distortion is usually referred to in terms of total harmonic distortion (THD) which is the percentage of unwanted harmonics of the drive signal present with the wanted signal. Generally used to mean any unwanted change introduced by the device under question.

Brooks Cinema QS - 95 reviews Initialize
To prepare a digital storage medium (like a floppy disk) so that it will accept and store digital information bits.

Inverse Square Law
Simply stated, the fact that in an un-obstructed area (like an open field) the sound pressure level will drop to half-pressure (-6 dB) every time the distance to the sound source is doubled.

In
Short For "in the circuit," in other words "active."

Channels
These are divided into two separate categories. Input channels are those channels coming into the soundboard such as microphones and direct lines. Output channels are those leaving the board such as monitor and main outputs.