Orban OPTIMOD 6300 Operating Manual page 187

OPTIMOD 6300 DIGITAL
This control works the same regardless of whether the AGC operates in
left/right or sum / difference M
maximum gain difference between the "channels." Depending on the
Matrix mode setting, the "channels" will handle left and right signals or
will handle sum and difference signals. When the AGC operates in sum /
difference M
of width change in the stereo soundfield.
Master Delta Threshold allows you to set the difference between the compression
thresholds of the sum and difference channels. (This control is only useful when you
set the AGC M
ATRIX
lower than the sum channel, you can have the AGC automatically produce more
gain reduction in the difference channel. This will reduce the separation of material
with an excessively wide stereo image (like old Beatles records). To make this work,
you must set the M
cessively wide image while preventing more than 3 dB difference in gain between
the sum and difference channels, set the M
M D T
ASTER ELTA HRESHOLD
automatic width control you want the 6300 to perform
Bass Delta Threshold works the same as M
the bass band. You will usually set it the same as M
AGC Crossover allows you to choose A
A
LLPASS is a phase-rotating crossover that introduces one pole of phase rotation at
200 Hz. The overall frequency response remains smooth as the two bands take dif-
ferent amounts of gain reduction—the response is a smooth shelf without extra
peaks or dips around the crossover frequency. The two bands are down 3 dB at the
crossover frequency. However, this mode adds group delay distortion and is there-
fore subtly less transparent-sounding than the L
L N D
INEAR O ELAY (Linear-Phase; no delay) is a phase-linear crossover whose upper
band is derived by subtracting its lower band from the crossover's input. When the
upper and lower bands have the same gain, their sum is perfectly flat with no phase
rotation. However, when the upper and lower bands have different gains, peaks and
dips appear in the frequency response close to the crossover frequency. It is useful if
you need a crossover with low delay and no phase distortion when flat. Its downside
is the possibility of coloration when the gains of the two bands are widely disparate.
Distortion Control Adjustments
Name
AGC Final Limit Drive
Bass Clip Shape
Bass Clip Threshold
Multiband Final Limit Drive
Speech Bass Clip Threshold
ATRIX
ATRIX mode, this control determines the maximum amount
to SUM/DIF.) By setting the threshold of the difference channel
D GR control away from zero. For example, to limit an ex-
AX ELTA
control to some positive number, depending on how much
LLPASS
Table 3-7: Distortion Control Adjustments
modes, in both cases controlling the
D GR control to 3.0 and the
AX ELTA
D T
ASTER ELTA HRESHOLD
D T
ASTER ELTA HRESHOLD
or L N D
modes.
INEAR O ELAY
N D
mode.
INEAR O ELAY
Range
–20.0 ... +12.0 dB
0.0 ... 10.0
–10.0 ... +10.00 dB, OFF
–20.0 ... +12.0 dB
–10.0 ... +10.00 dB, OFF
OPERATION
, but applies to
.
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