OPTIMOD-PC
OPERATION
3-55
gain reduction. Do not confuse this with the reverse exponential characteristic trig-
gered by setting the
2B
R
ELEASE
S
HAPE
control to
E
XPONENTIAL
. In this case, release
commences 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 want more density at
high amounts of gain reduction, increase the
2B
B
REAKPOINT
control’s setting. 10 dB
is a good starting point for setting this control.
Loudness Threshold
sets the maximum subjective loudness allowed by the process-
ing with reference to the input of the 1101’s MB look-ahead limiter. (See
on page 3-14.) Note that starting in V 3.1, 10 dB was added to the displayed
value of the CBS loudness controller threshold so that the default value is displayed
as “0 dB” instead of “–10 dB.” In other words, a displayed value of “0 dB” produces
the same amount of loudness controller gain reduction as “–10 dB” did in previous
software versions. Because this is a display change only, all User and Factory presets
will sound the same as they did in previous versions except for the effect of the
“BS.1770 Safety Limiter” (see above) if this is activated
Loudness Controller Attack
: See
on page 3- 14.
Loudness Controller Bass Couple
: See
BS.1770 Threshold
: See BS.1770 Safety Limiter on page 3-17.
Summary of Contents for Optimod-PC 1101
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