Orban OPTIMOD 6300, Operating Manual

Page: 165 / 255

OPTIMOD 6300 DIGITAL OPERATION
3-47
mences slowly and then speeds up as it progresses.
The
2B B
REAKPOINT
control is only active when the
2B R
ELEASE
S
HAPE
control is set to
L
INEAR
.
Compression-induced audio density remains constant when the gain reduction is
above the
2B B
REAKPOINT
setting. When the gain reduction is below the 2B
B
REAKPOINT
setting, density decreases proportionally to the amount of gain reduc-
tion.
For example, if the 2B B
REAKPOINT
is set to 10
DB
, the release rate (in dB/second) will
be constant when the gain reduction is above 10 dB. Between 10 dB and 0 dB gain
reduction, the release rate will slow down more and more.
The calibration of the B
REAKPOINT
controls is only accurate when K
NEE
= 0 dB and/or
R
ATIO
= infinity:1 — i.e., when the compression ratio is essentially infinite. When the
ratio is less than infinite, the effective breakpoint of the compressor will be lower
than
2B B
REAKPOINT
setting.
The main use of the 2B B
REAKPOINT
control is to prevent the compressor from objec-
tionably increasing audio density when using low compression ratios and a signifi-
cant amount of gain reduction—for example, 10 dB. The
2B B
REAKPOINT
control is
best adjusted by ear. If you find that density increases too much as gain reduction
increases, lower the
2B B
REAKPOINT
control’s setting. If you would like to have more
density at high amounts of gain reduction, increase the
2B B
REAKPOINT
control’s set-
ting. 10 dB is a good starting point for setting this control.
2B Crossover sets the structure of the 2-band crossover to Allpass or Linear. See
AGC C
ROSSOVER
on page 3-37 for more detail about these modes.
The 5-band Structure
The 5-band structure consists of a stereo enhancer, a slow gain-riding 2-band AGC,
an equalization section, a 5-band compressor, a dynamic single-ended noise reduc-
tion system, an output mixer (for the five bands), and a low-IM look-ahead limiter.
Unlike the 2-band structure, whose 2-band compressor has a continuously variable
release time, the release time of the 5-band compressor is switchable to seven in-
crements 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.