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AGC
The first processing stage is the AGC. It works across a large band of frequencies, and is intended
to normalize the difference in the audio levels fed at DB6400’s input. The AGC effectively reduces
the volume if the signal is strong and raises it when it is weaker. Having the task is to even out the
variances and to create a consistent performance, the AGC has influence over all the subsequent
processes.
AGC Gate
– if turned [On], in the event of audio drops below the user set limit (in dB), this
threshold will pause the operation of the audio processor. Hence limiting the unwanted floor noise
when the signal is too low.
AGC
– this section allows you to set the
Drive
,
Attack
and
Release
. When setting these
parameters, have in mind:
-
Drive (dB)
– depending on the value set, it will increase or decrease the gain at the AGC input.
Increasing the drive will compensate for the very low levels, and vice-versa - the low drive will
prevent the low level corrections at the input.
-
Attack
– set in dB per second, this value will define the AGC’s speed of reaction to unexpected
volume increase.
-
Release
– sets the AGC correction speed in dB per second. It is not mandatory high
Release
speed to be set, as the AGC is powerful enough tool. It is widely recommended the speed to be set
to 1dB/s and 1.5dB/s for classical music, and to 2dB/s for all other commercial programs.
High Pass Filter
– this sections allows you to turn [On] and [Off] the HP filter that passes
signals with a frequency higher than the set
HPF Freq
(High Pass Filter Frequency), and attenuates
signals with frequencies lower than the set
HPF Freq
(High Pass Filter Frequency). If the
Stereo
Link
is turned [On], the audio processor will check for differences between levels of the left and
right audio channel, and if need be, will restore the levels at the output. This feature is very useful
for jazz and classical programs, as when applied to pop/rock programs it may lead to sound power
loss.
