Glossary 559
PRO2 Live Audio System
Owner’s Manual
Stereo: Two separate channels, left and right,
used to give the listener the perception of where
the noise is coming from. Usually used with
music to give a fuller, more natural sound.
Stereo image: The perception of the different
sound sources coming from far left, far right or
anywhere in between.
Surround: Audio that has more than two
speaker locations and, therefore, more than two
channels. Also commonly termed “surround
sound”.
Sync: Abbreviation for “synchronisation”.
Synchronisation: Coordination of timing
between devices.
T
Tab: A ‘sheet’ in the From and To sections of
the Patching screen (GUI) that contains a
specific group of patch connectors. See
Patching.
Talk output panel: Routing system for talking
out from the console.
TFT: Abbreviation for “thin film transistor”.
Threshold: Level at which dynamics processing
will begin to operate.
Tie line: A dedicated connection between two
systems, typically between FOH and MON
positions.
To section: The rightmost area of the Patching
screen that contains the destination patch
connectors. See Patching.
Tooltip: The information box that appears next
to the cursor on some GUI screens when it is on
or near certain items, such as the channels on
the Dashboard screen or patch connectors on
the Patching screen.
Touchpad: Also known as “trackpad”. An input
device on a laptop PC for controlling the
on-screen pointer. See Glide pad and Trackball.
Track: Single stream of recorded audio data.
Trackball: Device for controlling the GUI. See
Navigation zone, Glide pad and Trackball.
Treble: Higher frequencies in a signal.
Tunnelling Ethernet: Mechanism by which to
transport a foreign protocol across a network
that normally wouldn’t support it.
TW: Abbreviation for “twin wire”.
U
Unbalanced audio: A type of audio connection
that utilises only two of the leads of a cable,
connector and jack.
Unfold: Navigates the input channels of a group
to the input bays.
USB: Abbreviation for “universal serial bus”. A
‘plug and play’ interface that provides a fast
connection between a computer and
peripherals, such as keyboards, printers,
scanners, digital cameras etc.
V
VCA: Abbreviation for “variable control
association”, as in VCA group (also “voltage
controlled amplifier”).
VCA fader: The fader control of a VCA group.
VCA group: A group of channels that are
controlled globally, such as via their group’s
fader and other controls. Provides an easy and
quick method of manipulating and controlling
the numerous channels available on the DL251/
DL252 Audio System I/O. See VCA.
VGA: Abbreviation for “video graphics array”. A
graphics display system for PCs developed by
IBM.
Virtual rack: A traditional 19” rack,
represented on the GUI. A virtual rack will,
typically, contain internal devices, such as
effects and GEQs.
volt (V): A unit of electrical potential differential
or electromotive force.
Volume: General term for a signal’s loudness.
VU meter: Abbreviation for “volume unit
meter”.
W
Window: A small self-contained panel that
appears on the GUI, usually after selection of a
specific control. Typically, contains a number of
user-selectable options or information in the
form of a message or prompt.
X
X-fade: Abbreviation for “crossfade”.
X-over: Abbreviation for “crossover”.
XLR connector: High-quality three-pin audio
connector, which is also used for AES/EBU
digital audio connections.
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