Orban Optimod-TV 8382, Руководство по эксплуатации

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OPTIMOD-TV DIGITAL OPERATION
3-21
With five-band presets, the audible effect of the midrange equalizer is closely asso-
ciated with the amount of gain reduction in the midrange bands. With small
amounts of gain reduction, it boosts power in the presence region. This can increase
the loudness of such material substantially. As you increase the gain reduction in the
midrange bands (by turning the
M
ULTIBAND
D
RIVE
(Multiband Drive) control up), the
M
ID
G
AIN
control will have progressively less audible effect. The compressor for the
midrange bands will tend to reduce the effect of the Mid frequency boost (in an at-
tempt to keep the gain constant) to prevent excessive stridency in program material
that already has a great deal of presence power. Therefore, with large amounts of
gain reduction, the density of presence region energy will be increased more than
will the level of energy in that region. Because the 3.7 kHz band compressor is par-
tially coupled to the gain reduction in the 6.2 kHz band in most presets, tuning
M
ID
F
REQ
to 2-4 kHz and turning up the
M
ID
G
AIN
control will decrease energy in the 6.2
kHz band—you will be increasing the gain reduction in both the 3.7 kHz and 6.2 kHz
bands. You may wish to compensate for this effect by turning up the
B
RILLIANCE
con-
trol.
With two-band presets, the midrange equalizer will behave much more as you
might expect because the two-band structure cannot automatically re-equalize mid-
range energy. Instead, increasing midrange energy will moderately increase the
Master band’s gain reduction.
Use the mid frequency equalizer with caution. Excessive presence boost tends to be
audibly strident and fatiguing. Moreover, the sound quality, although loud, can be
very irritating. We suggest a maximum of 3 dB boost, although 10 dB is achievable.
In some of our factory music presets, we use a 3 dB boost at 2.6 kHz to bring vocals
more up-front.
High Frequency Parametric Equalizer is an equalizer whose boost and cut curves
closely emulate those of an analog parametric equalizer with conventional bell-
shaped curves.
HIGH FREQ determines the center frequency of the equalization, in
Hertz. The range is 1-15 kHz
HIGH GAIN determines the amount of peak boost or cut over a

10 dB
range.
HIGH WIDTH determines the bandwidth of the equalization, in octaves.
The range is 0.8-4.0 octaves. If you are unfamiliar with using a parametric
equalizer, one octave is a good starting point.
Excessive high frequency boost can exaggerate hiss and distortion in program mate-
rial that is less than perfectly clean. We suggest no more than 4 dB boost as a practi-
cal maximum, unless source material is primarily from high-quality digital sources. In
several of our presets, we use this equalizer to boost the upper presence band (4.4
kHz) slightly, leaving broadband HF boost to the
B
RILLIANCE
and/or
HF E
NHANCE
con-
trols.
BRILLNCE (“Brilliance”) controls the drive to Band 5. The high frequency limiter and
Band 5 clipper dynamically control these boosts, protecting the final clipper from ex-