Trade name for a series of noise reduction systems that have become standard on many tape playback machines. Many film soundtracks are produced using this process. Different varieties are found from Dolby B on most personal cassette players, to Dolby SR and Digital, the current state of the art for cinema.
Key
The control of a dynamics processing device by an external audio signal.
Brooks Cinema KP 30 Ground Loop
A double grounding of a line or electronic device at two different "ground" points of differing voltage.
Compander
1) A two section device that is used in noise reduction systems. The first section compresses the audio signal, before it is recorded, and the second section, expands the signal after recording.
2) In Yamaha brand digital consoles, a signal processing function that applies both compression and expansion to the same signal.
Brooks XB 22 Leakage
Sounds from other instruments and sources that were not intended to be picked up by the microphone.
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).
Keyboard Controller
A device that has the standard music keys of piano but puts out MIDI signals
DC
Abbreviation for direct current.
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