3-54
OPERATION
ORBAN MODEL 1100
A)
Decide whether you are going to use two-band or five-band processing.
Two-band processing retains any fixed equalization originally applied to
the program (except for a mild amount of dynamic adjustment to bass
below 200 Hz); five-band processing performs an “automatic re-
equalization” function. Both flavors of processing can be extremely
smooth and unobtrusive. Because the five-band compressor/limiter offers
user-adjustable interband coupling that determines the “discreteness” of
the multiband compression, it is usually the best choice.
B)
If you are going to use two-band processing, recall the
2
B
C
LASSICAL
preset. If
you are going to use five-band processing, recall the
5
B
C
LASSICAL
preset.
C)
In the Edit/Basic Control screen, adjust
L
ESS
-M
ORE
to 1.0 (the lowest setting).
D)
Choose Edit/Advanced Control to access the individual processing settings.
E)
If you have recalled one of the
C
LASSICAL
presets, the AGC will already be
O
FF
.
If you need a very large amount of compression for an application like proc-
essing material intended for in-flight entertainment systems, you can edit ei-
ther edit the preset turn the AGC on, or start with a preset other than
C
LASSICAL
or
P
ROTECT
.
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 (3.C) on page 2-22.
F)
Unless you will be using a large amount of compression for special applica-
tions, set the
MB
G
ATE
T
HRESHOLD
to
O
FF
.
G)
Adjust the
2
B
D
RIVE
control (two-band) or
M
B
D
RIVE
control (five-band) to
achieve the desired amount of multiband gain reduction.
H)
Adjust the release time control (
2
B
R
ELEASE
or
M
B
R
ELEASE
) to achieve the de-
sired compression density.
If you are using the Five-Band structure, you can use the
D
ELTA
R
ELEASE
controls 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
ELEASE
control simply scales this process. This, combined
with multiband operation, makes the compression remarkably resistant
to the usual compressor pumping and squashing.
I)
Adjust the
A
TTACK
T
IME
controls on the individual compressors to trade off
overshoot control against transient punch.
J)
Adjust the
L
IMITER
A
TTACK
T
IME
controls to taste.
These controls allow you to set the limiter attack anywhere from 0 to
100% of normal in the Five-Band compressors, each of whose gain reduc-
tion has a fast-release (limiter) and slow-release (compressor) component.
Because the limiter and compressor characteristics interact, you will usu-
ally get best audible results when you set these controls in the range of
70% to 100%. Below 70%, you will usually hear pumping because the
compressor function is trying to create some of the gain reduction that
the faster limiting function would have otherwise achieved. If you hear
pumping in a band and you still wish to adjust the limiter attack to a low
