Orban OPTIMOD 6300 Operating Manual page 216

3-74
OPERATION
 If you are going to use 5-band processing, recall the 5
 If you want to do look-ahead peak limiting without any other dynamics
processing, recall the L
See Protection and AGC Presets on page 3-23 for a description of these
presets.
D) If you have started with one of the S
O . If you need a very large amount of compression for an application like
FF
processing material intended for in-flight entertainment systems, you can ei-
ther edit the preset to turn the AGC on or start with a preset other than S
K
.
NEE
You can turn the AGC off globally for all presets, which is convenient if
you don't expect to use it in the future. (See step 2 on page 2-21.)
For applications like in-flight entertainment, instead of continuing with
the steps below you may wish to use a factory TVxxxx preset, which uses
both the AGC and the Loudness Controller to reduce dynamic range by a
large amount with few audible side effects.
E) The purpose of the MB gate is to prevent background noise from being
sucked up when the program material is very quiet. (See page 3-58.) Unless
you will be using more than approximately 6dB of compression for special ap-
plications, set the MB G
In the S K
OFT NEE
The multiband gate only works appropriately when the K
controls of all bands are set identically, which is typically true in broad-
cast applications. We recommend turning off the multiband gate if the
individual K
NEE
F) If you are using the 5-band structure, choose the crossover frequency between
bands 1 and 2 via the B1/B2 C
Hz and 200 Hz.
The crossover frequency significantly affects the bass texture and the best
way to understand the differences between the two crossover frequen-
cies is to listen. We prefer 100 Hz for most mastering applications be-
cause it puts most of low instrumental bass energy (typically kick drum
and bass) in band 1 and most vocal fundamentals in band 2, allowing
these crucial mix elements to be adjusted more independently.
G) Adjust the 2 D
B RIVE
the desired amount of multiband gain reduction.
H) Adjust the release time control (2
sired compression density.
If you are using the 5-band structure, you can use the D
trols to fine-tune the release time of each band independently.
The release characteristic is always "automatic" (i.e., multiple time con-
stant), and the R
with multiband operation, makes the compression remarkably resistant
to the usual compressor pumping and squashing.
-A L
OOK HEAD IMITER
K
OFT
T to O
ATE HRESHOLD
and L -A L
OOK HEAD IMITER
and R
settings are unequal.
ATIO
ROSSOVER control. The available settings are 100
control (2-band) or M
R
B ELEASE
ELEASE control simply scales this process. This, combined
ORBAN MODEL 6300
S K
B OFT
preset.
presets, the AGC will already be
NEE
FF .
presets, this is already done.
and R
NEE
D
B RIVE control (5-band) to achieve
or M R
B ELEASE ) to achieve the de-
R
ELTA ELEASE
NEE preset.
OFT
ATIO
con-