| Glossary of PA Terms - Y
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Glossary, then click on your required term in the list
The glossary pages provide definitions for over 2680 PA-related
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In the list below, the most commonly looked-up terms
are in bold, lighting-specific terms are in
and video-specific terms are in
Y/C video *
Yellow Book *
The definitions for these terms are given on the assumption of
their use in the context of PA systems; many of the terms have
more general meanings when used in a wider context. Where more than
one definition is given for a term, the definitions are numbered
(1), (2) etc.
Some of the
definitions themselves use terms (such as "signal") in
a specific way − most of these are links (just the first time
they are used, in each definition), so just click on them to see
the meanings that are intended.
An abbreviation for
luminance. Use of the
letter Y may seem strange, but is
thought to be because of its appearance being indicative
of converging beams of the three additive primary
colours (red, green and blue), whose total illuminating
strength equals the value of luminance.
The symbol for
A device consisting of a plug and two sockets
internally wired together, to enable a single
output to be connected
to two inputs. This term
is used because the letter Y is similar in appearance
to the physical design of many types of this device.
Also called a 'splitter'. See also
A slang abbreviation for the equipment manufacturer
Yamaha, sometimes used to refer to an item of equipment
manufactured by them. See also
See CD standards.
An abbreviation for 'Yamaha General Digital Audio
Interface', identifying a series of expansion cards for
use in the option I/O slots of
The 'Mini' versions of these cards are most popular.
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This page last updated 05-Sep-2017.