OPTIMOD-FM OPERATION
3-43
Customizing the Settings
Each Two-Band Factory Preset has a Less/More control (located in the Basic Modify
screen) that adjusts on-air loudness.
Less/More simultaneously adjusts all of the process-
ing controls to optimize the trade-offs between unwanted side effects as processing levels
are decreased or increased.
If you wish, you may adjust the Modify parameters to your own taste. Always start with
Less/More to get as close to your desired sound as possible. Then edit the Modify pa-
rameters using the Basic, Intermediate or Advanced Modify screen, and save those edits
to a User Preset.
The Two-Band Structure’s Full Setup Controls
The tables below show a summary of the Two-Band controls in the dynamics section.
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.
Some of the Two-Band controls are common to the Intermediate Modify and Advanced
Modify screens, with additional Two-Band controls available in the Advanced Modify
screen.
Two-Band Controls
Intermediate Name Advanced Name Range
Drive 2B Drive 0 … 25 dB
Release 2B Release 0.5 … 20 dB/S
Gate Thresh Gate Thresh Off, –44 … –15 dB
Bass Coupling Bass Coupl 0 … 100 %
--- Lookahead 0 … 5 milliseconds
--- Master Compression Thresh –15 … 0
--- Bass Thresh –12.0 … 2.5 dB
--- Master Attack 4 … 50, Off
--- Bass Attack 4 … 50, Off
--- 2B Clipping –4 … +5
--- HF Limiting –4.0 … +2.0
--- HF Clip Thresh –16.0 … –0.2, Off
--- 2B Crossover LiNoDly, Linear
Table 3-6: Two-Band Controls
2B Drive control adjusts signal level going into the two-band compressor, and therefore
controls the density of output audio by determining the amount of gain reduction in the
two-band compressor. The resulting sound texture can be open and transparent, solid and
dense, or somewhere in between. The range is 0-25 dB.
Regardless of the release time setting, we feel that the optimal amount of gain reduction
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
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