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intervals at ever decreasing levels. The
intervals are so close that each copy is not
heard individually.
RMS: Abbreviation for "root-mean-square". The
square root of the mean of the sum of the
squares. Commonly used as the effective value
of measuring a sine wave's electrical power. A
standard in amplifier measurements. The
effective average value of an AC waveform.
s: Symbol for "second"; a unit of time.
Scene: In automation, a set of mix settings for
a particular part of a play or song.
Scratchpad memory: A function whereby a
channel's settings can be quickly saved/recalled.
There three memories available, which are
accessed via the input navigation zones.
Side chain: A special circuit that diverts a
proportion of the main signal so that it can be
processed, as required. Compressors use the
side chain to derive their control signals.
Sibilance: Energy from a voice, centred around
7kHz, caused by pronouncing "s", "sh" or "ch"
sounds.
Signal flow: The path of a signal from one
place to another.
SIP: Abbreviation for "solo in place".
SIS: Abbreviation for "spatial imaging system".
Combines a central loudspeaker cluster with a
left-right system to form three discrete sound
channels.
Snapshot: A captured group of mixer settings
that reflect the state of the mixer at a particular
moment within a song or project. This snapshot
can then be recalled at the required moment in
the performance/playback.
Soft patching: Making 'virtual' connections via
the GUI, for example, connecting the mics to
input channels.
Solo: During monitoring, the isolation of one
signal by silencing all other signals.
SPL: Abbreviation for "sound pressure level".
Given in decibels (dB), SPL is an expression of
loudness or volume.
SRC: Abbreviation for "sample rate converter".
SSD: Abbreviation for "solid-state disk". Data
storage device that uses non-volatile memory to
store data. Quicker than the conventional hard
disk and less susceptible to the failures
associated with hard disk drives.
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.
XL8 Control Centre
Operator Manual
Stereo image: The perception of the different
sound sources coming from far left, far right or
anywhere in between.
Stereo master strip: Dual-channel strip in the
output fast zone for control of the left and right
channels of a stereo master pair.
Synchronisation (sync): Coordination of
timing between devices.
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.
Track: Single stream of recorded audio data.
Trackball: Device, located in the primary
navigation zone, for GUI screen navigation and
control of the mix and output bays.
Treble: Higher frequencies in a signal.
Unbalanced: A type of audio connection that
utilises only two of the leads of a cable,
connector and jack.
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.
VCA: Abbreviation for "variable control
association".
VCA fader: The fader control of a VCA group.
VCA group: A number of channels assigned to a
group that has fader and other control functions.
Provides an easy and quick method of
manipulating and controlling the numerous
channels available on the XL8 Control Centre.
VCA group select button: A user-configurable
button for assigning and recalling VCA group
members.
VGA: Abbreviation for "video graphics array". A
graphics display system for PCs developed by
IBM.
Virtual rack: A GUI screen display showing
devices presented in the form of traditional 19"
rack mount gear.
volt (V): A unit of electrical potential differential
or electromotive force.
Volume: General term for a signal's loudness.
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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