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OPTIMOD-PC
amount of gain imbalance permitted between the left and right channels in a given
band, and therefore the amount of stereo image shift permitted in each frequency
band.
Although the processing is dual-mono, you cannot adjust setup controls independ-
ently on the left and right channels. We assumed that OPTIMOD-PC would always
process stereo program material or dual program sources requiring the same
amount of processing (like dual-language programming in video applications).
To operate in dual mode, you must create a five-band user preset with the following
settings:
AGC Matrix.......................................................................................... L/R
AGC MaxDelta GR.............................................................................. Off
Stereo Enhancer.................................................................................Out
Band 1-5 MaxDeltGR ......................................................................... Off
Audio Processing Signal Flow
STEREO
INPUT
ENHANCER
LF SHELVING EQ
HIGH
FREQUENCY
EQUALIZER
ENHANCER
Figure 3-2: Simplified OPTIMOD-PC Digital Signal Processing Diagram
The signal flows through OPTIMOD-PC through the following:
•
Stereo Enhancement, with two user selectable algorithms
MASTER
>150Hz
COMPRESSOR
AGC
COUPLING
CROSSOVER
BASS
<150Hz
COMPRESSOR
LF PEAKING EQ
MF PEAKING EQ
HF PEAKING EQ
EQUALIZER
EQUALIZER
EQUALIZER
>6kHz
COMPRESSOR
MULTIBAND
CROSSOVER
1800-6000Hz
COMPRESSOR
COMPRESSOR
520-1800Hz
100-520Hz
COMPRESSOR
XOVER IN
COMPRESSOR
<100Hz
or
+ EMBEDDED
<200Hz
CLIPPER
COUPLING
OUTPUT MIX
CONTROLS
CONTROLS
MASTER
>200Hz
COMPRESSOR
2-BAND
COUPLING
CROSSOVER
BASS
<200Hz
COMPRESSOR
3-9
OPERATION
LOW IM
5B
LOOK-AHEAD
LIMITER
2B
"PROCESSED WITHOUT LIMITING" OUT
MAIN
OUT
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