The Five-Band Structure; Putting The Five-Band Structure On The Air - Orban OPTIMOD-PC 1101 Operating Manual

3-56
OPERATION

The Five-Band Structure

Putting the Five-Band Structure on the Air

The Five-Band structure consists of a stereo enhancer, a slow gain-riding two-band
AGC, an equalization section, a five-band compressor, a dynamic single-ended noise
reduction system, an output mixer (for the five bands), and a low-IM look-ahead lim-
iter.
Unlike the Two-Band structure, whose two-band compressor has a continuously var-
iable release time, the release time of the Five-Band compressor is switchable to sev-
en increments between slow and fast. Each setting makes a significant difference in
the overall flavor and quality of the sound.
When the input is noisy, you can sometimes reduce the noise by activating the sin-
gle-ended noise reduction system. Functionally, the single-ended noise reduction
system combines a broadband downward expander with a program-dependent low-
pass filter. This noise reduction can be valuable in reducing audible hiss, rumble, or
ambient studio noise. We use it for the news and sports factory presets.
The Five-Band structure does not have a separate Loudness Controller because its
Five-Band compressor automatically re-equalizes the spectral balance of various
pieces of program material in a way that tends to make their loudness more consis-
tent.
The Five-Band structure is very flexible, enabling you to fine-tune your sound for
your target audience and desired market position. There are several basic Factory
Presets for the Five-Band structure. Each of these presets can be edited with the
L -M control. This control affects the video-oriented presets differently than it
ESS ORE
does the music presets (i.e., presets listed in Table 3-2 on page 3-27). When a video-
Five-Band Controls
Advanced Name
Multiband Drive
Multiband Gate Threshold
Downward Expander
B5 Downward Expander
Downward Expander Stereo Coupling
B1/B2 XOVER
B1 MaxDeltGr
B2 MaxDeltGr
B3 MaxDeltGr
B4 MaxDeltGr
B5 MaxDeltGr
Loudness Threshold
Loudness Attack
Loudness Bass Couple
BS.1770 Threshold
Table 3-9: Five-band Controls
ORBAN MODEL 1101
Range
0 ... 25
Off, –44 ... –15 dB
Off, –18.0 ... 12.0 dB
Off, –18.0 ... 12.0 dB
100 Hz, 200 Hz
0 ... 24 dB, Off
0 ... 24 dB, Off
0 ... 24 dB, Off
0 ... 24 dB, Off
0 ... 24 dB, Off
Off, +10.0 ... -14.0 dB
0...100%
0...12 dB, Off
0...6 dB, Off