Orban OPTIMOD 6300 Operating Manual page 186

3-44
OPERATION
AGC Ratio determines the compression ratio of the AGC. The compression ratio is
the ratio between the change in input level and the resulting change in output
level, both measured in units of dB.
The 6300 compressor can be operated at a compression ratio as low as 2:1. This can
add a sense of dynamic range and is mostly useful for subtle fine arts formats like
classical and jazz.
AGC Bass Threshold determines the compression threshold of the bass band in the
AGC. It can be used to set the target spectral balance of the AGC.
As the AGC B C control is moved towards "100%," the AGC B
PL
trol affects the sound less and less.
The interaction between the AGC B
trol is a bit complex, so we recommend leaving the AGC B
its factory setting unless you have a good reason for readjusting it.
AGC Idle Gain. The "idle gain" is the target gain of the AGC when the silence gate
is active. Whenever the silence gate turns on, the gain of the AGC slowly moves to-
wards the idle gain.
The idle gain is primarily determined by the AGC D
will ordinarily produce an idle gain of –10 dB (i.e., 10 dB of gain reduction). How-
ever, sometimes you may not want the idle gain to be the same as the AGC D
setting. The AGC I
DLE
gain setting determined by the AGC D
You might want to do this if you make a custom preset that otherwise causes the
gain to increase or decrease unnaturally when the AGC is gated. For example, to
make the idle gain track the setting of the AGC D
control to zero. To make the idle gain 2 dB lower than the setting of the AGC D
control, set the AGC I
DLE
AGC Bass Attack sets the attack time of the AGC bass compressor (below 200Hz).
AGC Master Attack sets the attack time of the AGC master compressor (above
200Hz).
AGC Bass Release sets the release time of the AGC bass compressor.
AGC Matrix allows you to operate the AGC in left/right mode or in sum / difference
mode. Usually you will operate in left/right mode. However, sum / difference mode
can give a type of stereo enhancement that is different from the enhancement
modes offered in the 6300's built-in stereo enhancer. This will only work if you allow
the two channels of the AGC to have different gains. To do this, set the AGC
M D GR control greater than zero.
AX ELT
AGC Max Delta GR determines the maximum gain difference permitted between
the two channels of the AGC. Set it to "0" for perfect stereo coupling.
T
ASS HRESHOLD
G
control allows you to add or subtract gain from the idle
AIN
setting.
RIVE
G
control to –2.
AIN
ORBAN MODEL 6300
T
ASS HRESHOLD
control and the AGC B C
T
ASS HRESHOLD
RIVE setting—a setting of 10 dB
control, set the AGC I
RIVE
con-
con-
PL
control at
RIVE
G
DLE AIN
RIVE