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OPTIMOD-PC
to the look-ahead limiter to prevent strong high frequency energy from triggering
audible gain pumping or ducking. The high frequency limiting action in the five-
band compressor also helps prevent this artifact.
LOOK-AHEAD LIMITER: The L
turns off the stereo enhancer, AGC, equalizer, and two-band compressor so that you
can use the processing as a fast look-ahead protection limiter.
This preset's L
ESS
from the input to the output of the audio processing block, which does not include
the Processor Mixer. Even though the gain is unity through the processing block,
you can still use the Processor Mixer to adjust the I/O gain according to your re-
quirements.
When L
-M
ESS
ORE
Processor Mixer's output clipping level. This means that there can be no look-ahead
limiter gain reduction because the Processor Mixer will clip before any gain reduc-
tion could occur. Functionally, L
This is equivalent to setting the input, threshold, and make-up gain con-
trols of a studio-style protection limiter to "0 dB."
To produce look-ahead limiter gain reduction, turn up the L
step of the L
-M
ESS
1 dB and increases the input/output gain by 1 dB for signals below the limiter
threshold. At L
ESS
9 dB and the input headroom (the difference between the processor mixer clipping
level and the look-ahead limiter threshold) is also 9 dB.
Instead of adjusting L
what L
-M
ESS
ORE
up to 12 dB of look-ahead limiting.
Do not set the F
so will compromise system headroom.
Adjusting the L
multaneously decreasing the threshold and increasing the make-up gain
in a protection limiter having threshold and output make-up gain con-
trols.
When the output level controls in the I/O Mixer are set to their maximum values, the
FACTORY PROGRAMMING PRESETS (PROTECTION; AGC)
Preset Names
AGC+FLAT LIMITER
AGC+50us LIMITER
AGC+75us LIMITER
LOOK-AHEAD LIMITER
-A
OOK
HEAD
control is set to 1.0. With this setting, there is unity gain
-M
ORE
= 1, the threshold of the look-ahead limiter is the same as the
-M
ESS
ORE
control increases the drive level to the look-ahead limiter by
ORE
= 10, the processor's gain below threshold has increased to
-M
ORE
, you could adjust the F
-M
ESS
ORE
actually does). The F
INAL
L
D
INAL
IMIT
RIVE
-M
or F
ESS
ORE
Source Preset
AGC+FLAT LIMITER
AGC+50us LIMITER
AGC+75us LIMITER
LOOK-AHEAD LIMITER
Table 3-1: Protection and AGC Presets
preset is a Two-Band preset that
L
IMITER
= 1 bypasses the processing.
L
INAL
IMIT
control allows you to achieve
L
D
IMIT
RIVE
control below "0" with this preset; doing
L
D
controls is equivalent to si-
INAL
IMIT
RIVE
OPERATION
control. Each
-M
ESS
ORE
control (which
D
RIVE
Normal Less-More
5.0
5.0
5.0
1.0
3-19
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