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OPTIMOD-PC
B2>B1 CPL control determines the extent to which the gain of band 1 (below 100Hz
or 200Hz, depending on crossover setting) is determined by and follows the gain of
band 2 (centered at 400Hz). Set towards 100% (fully coupled), it reduces the amount
of dynamic bass boost, preventing unnatural bass boost. Set towards 0% (independ-
ent), it permits frequencies below 100Hz (the "slam" region) to have maximum im-
pact in modern rock, urban, dance, rap, and other music where bass punch is crucial.
Accordingly, it can be useful in music video oriented formats.
Bx Out ("Band x Output Mix") controls determine the relative balance of the bands
in the five-band compressor. Because these controls mix after the band compressors,
they do not affect the compressors' gain reductions and can be used as a graphic
equalizer to fine-tune the spectral balance of the program material over a ±6 dB
range.
Their range has been purposely limited because the only gain control element after
these controls is the look-ahead limiter, which can produce pumping or distortion if
overdriven. The thresholds of the individual compressors have been tuned to pre-
vent audible distortion with almost any program material. Large changes in the fre-
quency balance of the compressor outputs will change this tuning, leaving
OPTIMOD-PC more vulnerable to unexpected audible distortion with certain pro-
gram material.
You can also get a similar effect by adjusting the compression threshold of the indi-
vidual bands. This is comparably risky with reference to look-ahead limiter overload,
but unlike the MB B
frequency response when a given band is below threshold and is thus producing no
gain reduction.
B1-B5 On/Off switches allow you to mute any combination of bands in the five-
Band Mix
Advanced Name
B2>B1 Coupling
B2>B3 Coupling
B3>B2 Coupling
B3>B4 Coupling
B4>B5 Coupling
B1 Output Mix
B2 Output Mix
B3 Output Mix
B4 Output Mix
B5 Output Mix
B1 On/Off
B2 On/Off
B3 On/Off
B4 On/Off
M
controls, the threshold adjustments do not affect the
AND
IX
Range
0 ... 100 %
0 ... 100 %
0 ... 100 %
0 ... 100 %
0 ... 100 %
–6.0 ... +6.0
–6.0 ... +6.0
–6.0 ... +6.0
–6.0 ... +6.0
–6.0 ... +6.0
On, Off
On, Off
On, Off
On, Off
Table 3-11: MB Band Mix Controls
3-51
OPERATION
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