de-ess – Using a frequency-dependent
function in a compressor to reduce excessive
sibilance ("sss”, "sh," and "ch") sounds.
detent – A point of slight physical resistance
(a click stop) in the travel of a knob or slide
control.
dynamic range – The range between the
maximum and minimum sound levels of an
audio system. It is usually expressed in
decibels as the difference between the level
at peak clipping and the level of the noise
floor.
equalizer – A frequency-dependent amplifier
that controls the relative amplitude of various
frequencies in the audible bandwidth. The
equalizer lets you exercise tonal control over
the harmonic content or timbre of a sound.
EQ curve – A graph of the response of an
equalizer, with frequency on the x (horizontal)
axis and amplitude (level) on the y (vertical)
axis. Equalizer types and effects are often
named after the shape of the graphed
response curve, such as peak, dip, shelf,
notch, knee and so on.
fade – A slow change in volume.
fader – A linear attenuation device or linear
volume control.
feedback – The returning of a loudspeaker
signal back into a microphone feeding the
loudspeaker. Excessive feedback results in
unpleasant, screaming sounds usually at
particular, high frequencies.
filter – A simple equalizer designed to
remove certain ranges of frequencies. A high-
pass filter (also called a low-cut filter) reduces
or eliminates frequencies below the cutoff
frequency. There are also high-cut (low-pass)
filters, bandpass filters, which cut both high
and low frequencies but leave a band of
frequencies in the middle untouched, and
notch filters, which remove a narrow band but
leave the high and low frequencies alone.
flanging – A process whereby a delayed
signal is combined with itself undelayed. The
delay is varied to create continual changes in
sound.
frequency – The rate at which a sound wave
repeats a cycle. The number of cycles that
occurs over the period of one second is called
hertz (Hz). Often , the perceived range of
hearing is from 20Hz to 18,000Hz.
gain – The measure of how much a circuit
amplifies a signal. Gain may be stated as a
ratio of input to output values, such as
decibels from line amplifier.
gain stage – An amplification point in a signal
path, either within a system or a single
device. Overall system gain is distributed
between the various gain stages.
graphic EQ – A type of equalizer where the
frequency
bands
for
cut/boost
and
bandwidths are fixed. Graphic EQs are
usually controlled by faders instead of knobs.
ground – The point of zero voltage in a circuit
or electrical system.
Page 38
Avalon Vt-747sp Operation Manual
Glossary
AVA L O N D E S I G N
AVA L O N D E S I G N
