Corporation Stereo System User's Manual

OPERATING INSTRUCTIONS FOR GAMBIT DE-ESSER/COMPRESSOR DS1-MK3 OPERATION
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change, audio is muted to avoid audio signal
cuts.
Graphic 6: System menu
Graphic 7: Overall Delay display
Setting preview: Touch either the „attack“ or
„release delay“ controller (  ) to activate the
timing 1 window, then use the gain / data con-
troller (  ) to adjust preview time.
Graphic 8: Timing 1 window
Envelope Follower
The envelope follower parameter controllers are
in area  . The purpose of the envelope follower
is to cause gradual gain changes, thus eliminat-
ing distortion. The current values are shown in
 .
Attack and Preview: The longer the attack
time, the more will the leading edge of fast tran-
sients pass by the gain reduction circuit unal-
tered (as in Graphic 9 during attack phase).
Very fast attack time settings such as 20µs, i.e.
one sample period, do catch every transient, but
may distort low frequencies. To utilise longer
attack times and still catch fast transients, use
preview.
Release and Average: The input signal is
monitored with two different methods: peak
amplitude (*) and RMS value. The peak ampli-
tude is the programme portion we don't perceive
as very loud, however which can easily cause
overloads. The RMS value of the programme
material we perceive as loudness. Its variations
contribute most to the dynamic range of the
audio.
The sidechain processor compares the two
measurements it obtained from the peaks and
the RMS. The ratio between the two determines
which time constant would be the appropriate
release, e.g. after short duration peak the faster
release will be applied during the release phase.
The time period over which the RMS value of the
programme material is averaged is set by the
"average" parameter. The effect of the average
parameter can best be studied on the gain re-
duction meter (  ). Fast "average" settings will
cause most of the gain reduction meter to move
very fast (depending on the "release fast" set-
ting) , slower settings will just have the top part
of the gain reduction move fast, with the bottom
part depending on the "release slow" setting.
(*) Peak / RMS: In the DS1-MK3 the peak
measurement is supplemented with an RMS
measurement with variable averaging time. To
access the RMS detection timeconstant touch
Graphic 9: Envelope Parameters