3-46
OPERATION
ORBAN MODEL 8500S
poses, inaudible to the listener. Low-level passages are increased in level by up to 10
dB, while the dynamics of crescendos are maintained.
The
CLASSICAL-2
BAND
preset is a two-band preset with the AGC turned off. It uses
considerable bass coupling to preserve the spectral balance of the input as well as
possible. Its
L
ESS
-M
ORE
control primarily affects the amount of compression, rather
than maximum loudness. It sounds essentially identical to the Protection structure.
CLASSICAL-2B+AGC
uses the AGC set for 2:1 compression ratio. Because of the
AGC, it affects more of the total dynamic range of the recording that does the
CLASSICAL-2
BAND
preset. However, the AGC provides extremely smooth and un-
obtrusive compression because of the gentle ratio and window gating. In this preset,
the Two-Band compressor is used very lightly with a fast release time as a peak lim-
iter. The AGC does almost of the compression.
During the evening hours when the audience is more likely to listen critically, a clas-
sical station may wish to switch to a custom preset (derived from the
CLASSICAL-2
BAND
preset) that performs less gain reduction. You can create such a preset by
modifying the
CLASSICAL-2
BAND
preset with the
L
ESS
-M
ORE
control — turn it
down to taste.
There are also two five-band classical presets. The
CLASSICAL-5
BAND
preset uses the
five-band structure with AGC defeated. It uses substantial interband coupling to re-
tain much of the frequency balance of the original source, but is capable of some-
what more “automatic equalization” than is
CLASSICAL-2
BAND
. It can therefore re-
equalize older program material, but there is also more risk that it will cause colora-
tion that might offend the classical purist.
CLASSICAL-5B+AGC,
like its two-band counterpart,
uses the AGC set for 2:1 compres-
sion ratio.
The five-band structure is not phase-linear, so the
CLASSICAL-5
BAND
preset is likely
to have slightly less audible transparency than the
CLASSICAL
T
WO
-B
AND
structure.
Customizing the Settings
Each Two-Band Factory Preset has a
L
ESS
-M
ORE
control (located in the Basic Modify
screen) that adjusts on-air loudness.
L
ESS
-M
ORE
simultaneously adjusts all of the
processing controls to optimize the trade-offs between unwanted side effects as
processing levels are decreased or increased.
If you wish, you may adjust the Modify parameters to your own taste. Always start
with
L
ESS
-M
ORE
to get as close to your desired sound as possible. Then edit the Mod-
ify parameters using the Basic, Intermediate or Advanced Modify screen, and save
those edits to a User Preset.
Summary of Contents for OPTIMOD-FM 8500S
Page 1: ...Operating Manual OPTIMOD FM 8500S Digital Audio Processor Version 1 0 Software...
Page 7: ...Operating Manual OPTIMOD FM 8500S Digital Audio Processor Version 1 0 Software...
Page 26: ......
Page 56: ......
Page 164: ......
Page 308: ......
Page 310: ...6 28 TECHNICAL DATA ORBAN MODEL 8500S CONTROL BOARD PARTS LOCATOR...
