Operator Manual

Glossary 555
PRO2 Live Audio System
Owner’s Manual
processing done after an analogue audio signal
has been converted into digital audio. Can be
used to create, for example, compression,
equalization etc., of a digital signal. A digital
signal processor is a piece of equipment
specifically designed for carrying out signal
processing.
E
E zone: Section in the input channel strip for
controlling EQ parameters.
Effect: One of a number of audio processes that
can be applied to a signal to modify it, such as
reverb, flanging, phasing, delay etc.
Effects rack: On the PRO2 GUI, a virtual rack
of internal processors. See Virtual rack.
Envelope: 1. How a sound or audio signal
varies in intensity over time. 2. The visual
representation of such, usually shown on a
graph in a GUI channel strip.
EQ: Abbreviation for “equaliser” or
“equalisation”.
Equalisation: Adjusting the frequency response
so that the levels of all frequencies are equal or
the same. Bass and treble controls are
equalization controls.
EtherCon®: A cable connector for data transfer
interconnections, which is more robust than the
basic RJ45.
F
Fader: Slider-type device for precise
adjustment of signal level or volume of a
channel.
Fast strip: A channel strip in one of the fast
zones. See Fast zone.
Fast zone: An area on a bay that contains quick
controls. See Fast strip.
FB: Abbreviation for “front-back”. A term used
in surround panning.
Feedback: See Acoustic feedback.
Filter: A device for removing frequencies above
or below certain levels.
FOH: Abbreviation for “front of house”. The
area in a theatre used by the public. Used to
describe a console/control centre being used to
control the sound that the audience will hear
(and not the performers’ monitor system).
Frequency: The number of times that a sound
wave’s cycle repeats within one second.
Fricative: A consonant, such as “f” or “s”,
produced by the forcing of breath through a
constricted passage.
From section: The leftmost area of the
patching screen that contains the source patch
connectors. See Patching.
FX: Abbreviation for “sound effects”.
G
Gain: Another term for signal level.
Gain reduction (compressor): Decrease in
gain when input signal is above threshold. See
Gain.
GEQ: Abbreviation for “graphic equaliser”. See
Graphic EQ.
GEQ rack: A virtual rack of GEQs. See Virtual
rack.
Glide pad: Device for controlling the GUI. See
Navigation zone, Touchpad and Trackball.
Granularity: A measure of the size of
components or a description of the components
comprising a system.
Graphic EQ: A form of EQ that has a number of
faders for controlling the gain of the audio
signal. The faders are set at frequency bands
that are evenly-spaced according to octaves.
GUI: Abbreviation for “graphical user interface”.
GUI channel strip: Rightmost section of a GUI
screen that represents the detail area of the
input or output channel strip selected to the
control surface.
GUI menu: A menu selectable at either GUI
screen by clicking the home button (upper-left
corner).
GUI screen: One of the PRO2’s five screens,
which comprise the GUI.
H
HPF: Abbreviation for “high pass filter”. A filter
that removes lower frequencies from a signal,
leaving the higher frequencies unaffected.
Hum: Undesirable low frequency tone present in
a signal due to grounding problems or proximity
to a power source.
Hz: Symbol for “Hertz”. A unit of frequency
equal to one cycle of a sound wave per second.
I
I zone: Area on the output bay that contains
the operator-assignable controls.