Orban OPTIMOD 6300, Руководство по эксплуатации

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OPERATION ORBAN MODEL 6300
AGC set to O
FF
) maintains a sense of dynamic range while still controlling levels ef-
fectively.
2B REL (“2B Release”) control determines how fast the 2-band compressor releases
(and therefore how quickly loudness increases) when the level of the program mate-
rial decreases. This release time only applies when the silence gate does not gate the
2-band Compressor.
The control can be adjusted from 0.5 dB/second (slow) to 20 dB/second (fast). Set-
tings toward 20 dB/second result in a more consistently loud output, while settings
toward 0.5 dB/second allow a wider variation of dynamic range. Both the setting of
the
2B R
EL
control and the dynamics and level of the program material determine
the actual release time of the compressor.
With faster
2B R
EL
control settings (above 8 dB/second), the sound will change sub-
stantially with the amount of gain reduction in the 2-band compressor. This means
that you should activate the gain-riding AGC to ensure that the 2-band compressor
is always being driven at the level that produces the amount of gain reduction de-
sired. Decide based on listening tests how much gain reduction gives you the density
that you want without creating a feeling of over-compression and fatigue. For most
applications, we recommend using slower release rates because applications that
could use faster 2-band release rates are usually better suited to 5-band processing.
5-band processing minimizes the undesirable artifacts that fast release rates can
produce.
The release rate (in dB/second) in the 2-band compressor automatically becomes
faster as more gain reduction occurs. This makes the program progressively denser,
creating a sense of increasing loudness although peaks are not actually increasing.
At the gain reduction values set by the
2B M
ASTER
B
REAKPOINT
and 2B B
ASS
B
REAKPOINT
controls, the release rate for these bands becomes constant and density
does not increase with additional amounts of gain reduction.
2B REL SHAPE (“2B Release Shape”) selects a LINear or EXPonential release shape.
Linear causes the 2-band compressor to release at a constant number of dB per sec-
ond above the
2B B
REAKPOINT
setting and proportionally to the amount of gain re-
duction otherwise.
Despite its name, E
XPONENTIAL
actually offers a reverse-exponential characteristic: It
causes the release to commence slowly and then speed up as it progresses. The
E
XPONENTIAL
shape allows you to create the open sound of a slow release time with
program material that is well controlled in level, while permitting the processing to
quickly correct excessively low input levels. We recommend using Exponential for
general-purpose sound-for-picture programming. For program material dominated
by music,
L
INEAR
may be a better choice because Exponential may create unnatural
side effects. (If the 2B Release control is set between about 0.5 and 2 dB/second, an
Exponential release shape should cause no problems even with music.)
Note: The B
REAKPOINT
controls do nothing when E
XPONENTIAL
release is chosen.