Orban OPTIMOD 6200, Руководство по эксплуатации

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OPTIMOD OPERATION
3-17
1dB steps) with a 12dB/octave slope. 3P provides a range of 0dB to +12dB (in 1dB
steps) at 110Hz and below with an 18dB/octave slope.
Because the Multi-Band structure often increases the brightness of program material,
some bass boost is usually desirable to keep the sound spectrally well balanced. Adjust-
ment of bass equalization must be determined by individual taste and by the require-
ments of your format. Be sure to listen on a wide variety of radios — it is possible to
create severe distortion on poor quality speakers by over-equalizing the bass. Be careful!
The moderate-slope (12dB/octave) shelving boost achieves a bass boost that is more au-
dible on smaller radios, but which can sound boomier on high-quality receivers. The
steep-slope (18dB/octave) shelving boost creates a solid, punchy bass from the better
consumer radios with decent bass response. There are no easy choices here; you must
choose the characteristic you want by identifying your target audience and the receivers
they are most likely to be using. Regardless of which curve you use, we recommend a +2
to +4dB boost for most formats.
The
LOW BASS
boost control steps first through the 2P curves and then
through the 3P curves. For example, a 4dB boost with a 12dB/octave slope
would appear as “2P +4,” and a 10dB boost with an 18dB/octave slope
would appear as “3P +10.”
DJ BASS control determines the amount of bass boost produced on some male voices.
In its default
off
position, it causes the gain reduction of the lowest frequency band to
move quickly to the same gain reduction as its nearest neighbor when gated. This fights
any tendency of the lowest frequency band to develop significantly more gain than its
neighbor when processing voice because voice will activate the gate frequently. Each
time it does so, it will reset the gain of the lowest frequency band so that the gains of the
two bottom bands are equal and the response in this frequency range is flat. The result is
natural-sounding bass on male voice.
If you like a larger-than-life, “chesty” sound on male voice, set this control on . When the
control is
on
, the processing simply freezes the gain of the lowest band under gated con-
ditions. Accordingly, there can be a large average gain difference between the two low
frequency bands and the system can produce considerable dynamic bass boost on voice.
This will be highly dependent on the fundamental frequency of the voice. If the funda-
mental frequency is far above 100Hz there will be little voice energy in the bottom band
and little or no audio bass boost can occur even if the gain of the bottom band is higher
than the gain of its neighbor. As the fundamental frequency moves lower, more of this
energy leaks into the bottom band, and you hear more bass boost. If the fundamental fre-
quency is very low (a rarity), there will be enough energy in the bottom band to force
significant gain reduction, and you will hear less bass boost than if the fundamental fre-
quency were a bit higher.
This control is only available in the Multi-Band structure.
If the
GATE THR
(Gate Threshold) control is turned
off
, the
DJ BASS
boost
setting is disabled (and set to
off
).