Orban OPTIMOD-FM 8600Si, Руководство по эксплуатации

Страница: 221 / 356

OPTIMOD-FM DIGITAL OPERATION
3-55
The release time can be adjusted from 0.5 dB / second (slow) to 20 dB / second (fast).
Settings toward 20 dB / second result in a more consistently loud output, while set-
tings toward 0.5 dB / second allow a wider variation of dynamic range. Both the set-
ting of the
2B R
ELEASE control and the dynamics and level of the program material
determine the actual release time of the compressor.
The action of the
2B R
ELEASE control has been optimized for resolution and adjust-
ability. However, its setting is critical to sound quality—listen carefully as you adjust
it. There is a point beyond which increasing density (with faster settings of the
2B
R
ELEASE control) will no longer yield more loudness and will simply degrade the
punch and definition of the sound.
When the
2B R
ELEASE control is set between 8 and 1 dB / second (the slowest set-
tings), the amount of gain reduction is surprisingly non-critical. Gating prevents
noise from being brought up during short pauses and pumping does not occur at
high levels of gain reduction. Therefore, the primary danger of using large amounts
of gain reduction is that the level of quiet passages in input material with wide dy-
namic range may eventually be increased unnaturally. Accordingly, when you oper-
ate the
2B R
ELEASE control between 8 and 2 dB / second, it may be wise to defeat
the gain-riding AGC and to permit the two-band compressor to perform all of the
gain riding. This will prevent excessive reduction of dynamic range and will produce
the most natural sound achievable from the Two-Band structures.
With faster
2B R
ELEASE control settings (above 8 dB / second), the sound will change
substantially with the amount of gain reduction in the two-band compressor. This
means that you should activate the gain-riding AGC to ensure that the two-band
compressor is always being driven at the level that produces the desired amount of
gain reduction. Decide based on listening tests how much gain reduction gives you
Two-Band Controls
PC Remote Name Range
2B Drive –10 … 25 dB
2B Release 0.5 … 20 dB / S
Gate Thresh Off, –44 … –15 dB
Bass Couple 0 … 100 %
Lookahead 0 … 5 milliseconds
Master Compression Thresh –15 … 0, Off
Bass Compression Thresh –10.0 … 5.0 dB, Off
Master Attack 4 … 50, Off
Bass Attack 4 … 50, Off
2B Clipping –4 … +5
HF Limiting (located on Clippers screen) –4.0 … +2.0
HF Clip Thresh –16.0 … 0.0, Off
2B Crossover LiNoDly, Linear
MB Limit Thr –3.0 +6.0, Off
Speech Thr –4.0 ... +5.0 dB
Max Dist Ctrl 0 … 18 dB
Table 3-8: Two-Band Controls