Brooks Cinema XR 607 Crossover

1) A route leading from one side of the stage to the other, out of the audiences view.
2) An electronic filter in a sound system that routes sound of the correct frequency to the correct part of the speaker system. Different speakers handle high frequencies (tweeters) and low frequencies (woofers). Sometimes known as a crossover network. An active crossover splits the signal from the mixing desk into high, mid and low frequencies which are then sent to three separate amplifiers.
3) An electrical circuit that divides a full bandwidth signal into the desired frequency bands for the loudspeaker components.

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

Brooks KS-55 Circuit
1) One complete path of electric current.
2) Similar to definition 1, but including all paths and components to accomplish one function in a device.

Buss (Bus)
A wire carrying signals to some place, usually fed from several sources.

Brooks SS 81 Foot Switch
A switch placed on the floor and pressed by a musician to do various functions.

Electricity
Electrical current (the amount of electron charge passing a point in a conductor per unit of time) or voltage (the force pushing electrons to obtain electrical current).

Insulator
A substance such as glass, air, plastic, etc., that will (for all practical purposes) not conduct electricity.

A/D
An abbreviation of Analog to Digital Conversion (the conversion of a quantity that has continuous changes into numbers that approximate those changes), or Analog to Digital Converter.