Advanced Agc Controls - Orban OPTIMOD 6300 Operating Manual

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OPTIMOD 6300 DIGITAL OPERATION
AGC B CPL ("AGC Bass Coupling") control clamps the amount of dynamic bass boost
(in units of dB) that the AGC can provide. (In V1.0, the unit of measure was percent.)
The AGC processes audio in a master band for all audio above approximately 200 Hz
and a bass band for audio below approximately 200 Hz. Starting with V1.1 software,
the AGC Master and Bass compressor sidechains operate without internal coupling.
The gain reduction in the Bass audio path is either the output of the Bass compres-
sor sidechain or the output of the Master band sidechain. The AGC B C
ASS OUPLING
control sets the switching threshold. For example, if the AGC B C
control
ASS OUPLING
is set to 4 dB and the master gain reduction is 10 dB, the bass gain reduction cannot
decrease below 6 dB even if the gain reduction signal from the Bass compressor
sidechain is lower. However, the audio path bass gain reduction can be larger than
the master gain reduction without limit. In the previous example, the bass gain re-
duction could be 25 dB
The normal setting of the AGC B C
ASS OUPLING control is 0 dB, which allows the AGC
bass band to correct excessive bass as necessary but does not permit it to provide a
dynamic bass boost.
Note that the operation of this control was changed in 6300 V1.1 software to work
as explained above. You may have to tweak this control to achieve the same bass
balance that you had previously with V1.0 software.
AGC METR ("AGC Meter Display") determines what signal the front-panel AGC
meter displays. M
ASTER displays the gain reduction of the Master (above-200 Hz)
band. D
ELTA displays the difference between the gain reduction in the Master and
Bass bands. Full-scale is 25 dB gain reduction.
Although it is located in the Full Modify screen (to make it easy for a preset devel-
oper to switch meter modes), this control is not part of the active preset and its set-
ting is not saved in User Presets, unlike the other controls in the Full Modify screens.
The meter mode always reverts to M
when the user leaves Full Modify.
ASTER

Advanced AGC Controls

The following AGC controls are available only in the 6300 PC Remote software.
AGC Window Size determines the size of the "target zone" window in the AGC. If
the input level falls within this target zone, the AGC release time is set to the num-
ber specified by the AGC W R
INDOW ELEASE control. This is usually much slower than
the normal AGC release; it essentially freezes the AGC gain. This prevents the AGC
from building up density in material whose level is already well controlled. If the
level goes outside the window, then the AGC switches to the release rate specified
by AGC M R
so the AGC can still correct large gain variations quickly.
ASTER ELEASE
The normal setting for the AGC W S
INDOW IZE is 3dB.
AGC Window Release (see AGC W S
above.)
INDOW IZE