Brooks TA 60 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.

Frequency
The number of cycles of a waveform occurring in a second.

Brooks GS 15 Bi-Amplification
1) A way of optimizing the efficiency of a speaker system by separately amplifying the High Frequency (HF) and Low Frequency (LF) portions of the sound signal and sending them down two pairs of cables to the speaker. Multipin Speakon connectors have been developed to do this.
2)The process of having of having low-frequency speakers and high-frequency speakers driven by separate amplifiers.

Hum
The 60 Hz power line current accidentally induced or fed into electronic equipment.

Brooks XB 22 Capacitance
The property of being able to oppose a change in voltage or store an electrical charge.

Isolation Booth/ Isolation Room
A room that prevents loud sounds from other instruments from leaking in: an isolation booth is usually a smaller room that could be used for only one musician.

Gain Structure
The way in which the gain varies in the stages or sections of an audio system.

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