The Two-Band Structure's Setup Controls - Orban OPTIMOD-FM 8500S Operating Manual

OPTIMOD-FM DIGITAL

The Two-Band Structure's Setup Controls

The tables below show a summary of the Two-Band controls in the dynamics section.
These controls are available only from PC Remote.
AGC, Equalizer, Stereo Enhancer, and Clipper controls are common to
both Two-Band and Five-Band structures and are described in their own
sections earlier in Section 3.
Except as noted, these controls affect both the analog and HD processing
chains.
2B Drive control adjusts signal level going into the two-band compressor and there-
fore controls the density of output audio by determining the amount of gain reduc-
tion in the two-band compressor. The resulting sound texture can be open and
transparent, solid and dense, or somewhere in between. The range is –10 to 25 dB.
Regardless of the release time setting, we feel that the optimum amount of gain re-
duction in the two-band compressor for popular music and talk formats is 10-15 dB.
If less gain reduction is used, loudness can be lost. For classical formats, operating
with 0-10 dB of gain reduction (with the gain riding AGC set to O
sense of dynamic range while still controlling levels effectively. Because OPTIMOD-
FM's density gently increases between 0 and 10 dB of compression, 10 dB of com-
pression sounds very natural, even on classical music.
2B Release control determines how fast the two-band compressor releases (and
therefore how quickly loudness increases) when the level of the program material
decreases. This release time only applies when the Two-Band Compressor is not
Two-Band Controls
PC Remote Name
2B Drive
2B Release
Gate Thresh
Bass Couple
Lookahead
Master Compression Thresh
Bass Compression Thresh
Master Attack
Bass Attack
2B Clipping
HF Limiting (located on Clippers screen)
HF Clip Thresh
2B Crossover
MB Limit Thr
Speech Thr
Max Dist Ctrl
Range
–10 ... 25 dB
0.5 ... 20 dB / S
Off, –44 ... –15 dB
0 ... 100 %
0 ... 5 milliseconds
–15 ... 0, Off
–10.0 ... 5.0 dB, Off
4 ... 50, Off
4 ... 50, Off
–4 ... +5
–4.0 ... +2.0
–16.0 ... 0.0, Off
LiNoDly, Linear
–3.0 +6.0, Off
–4.0 ... +5.0 dB
0 ... 18 dB
Table 3-6: Two-Band Controls
OPERATION
) maintains a
FF
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