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OPTIMOD-PC
hardware reset or Ctrl-Alt-Del), OPTIMOD-PC will also reset and will temporarily
load unity-gain bypass DSP code. This will cause a mute lasting a fraction of a
second. OPTIMOD-PC will then continue to pass signal through this bypass code
until its driver has loaded, at which point the driver will load normal audio proc-
essing DSP code into OPTIMOD-PC. After another fraction-of-a-second mute to
accommodate the load, OPTIMOD-PC will now operate normally, using the same
preset that was active before the crash.
See About the OPTIMOD-PC Driver and Service on page 2-43.
Using OPTIMOD-PC for Production and Mastering
OPTIMOD-PC can be a useful tool for mastering and production applications in the
professional audio industry, such as preparation of equalized, level-controlled, peak
limited CD masters. We have frequently used OPTIMOD-PC in this context, achieving
excellent results.
Because of their broadcast origins, most of OPTIMOD-PC's presets provide more
processing than would ordinarily be required for mastering. In addition, we would
expect that the mastering engineer would want to carefully tweak a preset to com-
plement the program material being mastered. OPTIMOD-PC V2 provides important
tools to allow a mastering engineer to fine-tune the processing to complement the
program material:
•
Three bands of parametric equalization with low-noise filter structures and
curves modeled after classic second-order analog bell-shaped EQ.
•
A powerful, low-noise parametric bass shelving equalizer with sweepable fre-
quency and a choice of 6, 12, or 18 dB/octave slopes.
•
Two-band and five-band compressor/limiters with phase-linear crossovers and
powerful controls, including attack time, release time, and threshold for each
band. These compressor/limiters also feature user-adjustable interband coupling
to allow the user to operate them anywhere from quasi-wideband to fully inde-
pendent.
•
A look-ahead peak limiter with advanced, proprietary distortion reduction algo-
rithms.
You cannot create a user preset "from scratch"; you must create it by modifying an
existing preset, factory or user. Each preset has an "easy adjustment" facility called
L
-M
, which is a one-knob provision for turning the amount of processing up
ESS
ORE
or down.
Systematically, the following is a good method for creating mastering presets. It as-
sumes that you have already set the processor mixer controls to achieve normal drive
levels.
3-53
OPERATION
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