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PRO1 Live Audio System
Owner’s Manual
Glossary
This section provides an explanation of some of the symbols, terms and abbreviations used in this
manual.
5.1 surround: A surround sound system
created from six channels that form a discrete
signal, which is played back over a speaker
system comprising five speakers (three front
and two rear) and a subwoofer (which is the “.1”
or LFE channel). See LFE.
µ: Micro- prefix symbol that represents 10
-6
or
one millionth.
A
A/D: Abbreviation for “analogue to digital”. The
conversion of a continuous signal into a numeric
discrete sample sequence.
AC: Abbreviation for “alternating current”.
Acoustic feedback: A sound loop existing
between an audio input and audio output that is
amplified on each cycle. For example, a mic
input signal is amplified and passed to a
loudspeaker. The output from the loudspeaker
is picked up by the mic, which amplifies it again
and passes it back to the loudspeaker, and so
on.
AES/EBU: Abbreviation for “Audio Engineering
Society/European Broadcasting Union”; see
AES3.
AES3: Also known as “AES/EBU”, this is a serial
interface for transferring digital audio between
devices.
AES50: AES digital audio engineering standard.
AES50 is a high resolution, multi-channel audio
interconnection (HRMAI). Rather than a
network, it is a high-performance, point-to-point
audio interconnection, although the auxiliary
data may operate as a true network,
independently of the audio. HRMAI provides a
professional multi-channel audio interconnection
that uses Cat 5e data cable and is compatible
with Ethernet networks.
AFL: Abbreviation for “after fader listen”. A
function that allows the signal to be monitored
post-fader, that is, after it has been acted upon
by the fader.
Algorithm: In computing, a set of instructions
for accomplishing a specific task.
amp (A): Abbreviation for “ampere”. A unit of
current.
Anti-aliasing: When referring to digital images,
a technique that avoids poor pixelation.
Area A: Primary input control area.
Area B: Secondary input control area.
Assignable controls: Any controls, such as
select buttons (LCD switches), that can be set
up by the user to control any function required.
Auto safe: Prevents channel from accepting
scene recall.
Auto-mute: A function that automatically
mutes the channel’s signal under certain
conditions.
Auto-mute group: A function that
automatically mutes a number of selected
channels under certain conditions.
Automation: 1. Memorization and playback of
changes made to mixer settings. 2. An area on
the output bay that controls these.
Aux: Abbreviation for “auxiliary send” or “aux
send”. A designation for extra buses, typically
used for sending signal to effects, headphone
amps and other destinations. See Bus.
Aux send: See Aux.
B
Balanced audio: A type of audio connection
that uses the three leads in a cable, connector
and jack as part of a phase-cancelling
arrangement to boost the signal and reduce
noise.
Band: In EQ, a range of frequencies.
Bandwidth: In EQ, the width of a band, that is,
the number of frequencies that will be
boosted/cut above and below a centre
frequency.
Bank: A fixed number of channels.
Bass: Lower frequencies in a signal.
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