Orban Optimod-PC 1101, Руководство по эксплуатации

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3-26
OPERATION ORBAN MODEL 1101
The analog output can p24 dBu into a balanced load without
clipping. If you are driving an unbalanced load (by grounding one side of
the output), the gain does not change. However, the clipping level de-
clines to slightly above +18 dBu, so you must turn down the analog out-
put level control to –6.0 dB or lower to avoid clipping.
PROTECT : This is a two-band preset designed to produce no gain reduction unless it
encounters unusually high input levels caused by operator error. It uses the 2B com-
pressor to control excessive levels, so it is more forgiving than the
L
OOK
-
AHEAD
and
P
ASS
-T
HROUGH
presets, which offer only peak limiting.
SOFT KNEE 5B; SOFT KNEE 2B : These presets are “zeroed-out” starting points for
mastering applications , particularly where soft knee compression is desired. These
presets need to be manually tweaked to complement the program material being
processed
. See Using OPTIMOD-PC for Production and Mastering starting on page 3-
64.
These presets are phase-linear. They set all equalization flat and turn off the AGC.
The multiband compressor (two-band or 5-band) is set to supply a very soft-knee
compression characteristic with approximately 5-10 dB of gain reduction. The ratio
for a given compressor starts out at 1:1 and ends up at
∞
:1 when the input level is 20
dB above threshold.
Mastering engineers will certainly want to adjust the compression thresholds and
band coupling to complement the program material. The ratio and knee controls
are adjustable separately for each band’s compressor. For example, one might want
to use a low ratio and soft knee in bands 1-4 while using a higher ratio and/or hard-
er knee in band 5 (for de-essing).
The 1101’s powerful equalization section is, of course, also available. Additionally,
these presets set the look-ahead limiter drive control conservatively, which ensures
highest quality. However, the 1101’s look-ahead limiter can be driven quite hard
without objectionable side effects, so the 1101 can create competitively loud mas-
ters.
Radio-Style Presets
The presets ( Table 3-2 on page 3-27) have been named similarly to their radio coun-
terparts in Orban’s OPTIMOD-FM 8400 and 8500. The basic audio texture of corre-
sponding OPTIMOD-PC and 8500 presets (heard through the 8500’s digital radio
output) is similar, although the 1101 will tend to have 1-2 dB more bass. In addition,
all 1101 presets have the stereo enhancer turned off to reduce potential codec ste-
reo encoding artifacts.
If you wish to reduce the bass, set the Band 1 and/or Band 2 compression
thresholds lower to taste. Then save your work as a User Preset.