Orban OPTIMOD-FM 8600Si, Operating Manual

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OPTIMOD-FM DIGITAL OPERATION
3-19
memory (as if you had saved them from the 8600Si’s front panel). The PC Remote
application also allows you to
archive presets to your computer’s hard drive (or
other storage device) and to restore them. However, archiving a preset is not the
same as saving it. Archived presets reside on a storage medium supported by
your computer, while saved presets reside in the 8600Si’s local non-volatile
memory. You cannot archive a preset until you have saved it. (See
To back up us-
er presets, system files, and automation files onto your computer’s hard drive on
page 3-93.)
Note that if, for some reason, you wish to save an unmodified preset (ei-
ther Factory or User) under a new name, you must temporarily make an
arbitrary edit to that preset in order to make the
S
AVE
P
RESET
button ap-
pear. After you have saved the preset, reverse the edit and save the pre-
set again.
About the Processing Structures
If you want to create your own User Presets, the following detailed discussion of the
processing structures is important to understand. If you only use Factory Presets or if
you only modify them with
L
ESS
-M
ORE
, then you may still find the material interest-
ing, but it is not necessary to understand it to get excellent sound from the 8600Si.
In the 8600Si, a processing structure is a program that operates as a complete audio
processing system. Only one processing structure can be on-air at a time. Just as
there are many possible ways of configuring a processing system using analog com-
ponents (like equalizers, compressors, limiters, and clippers), 8600Si’s DSP hardware
can realize several possible processing structures. Unlike an analog system, where
creating a complete processing system involves physically wiring its various compo-
nents together, the 8600Si realizes its processing structures as a series of high-speed
mathematical computations made by Digital Signal Processing (DSP) integrated cir-
cuit chips. In the 8600Si, both structures operate simultaneously so there is no delay
in switching between them, which is done with a smooth cross-fade.
There are three basic structures: Two-Band, Five-Band , and Ultra-Low latency
Five-Band . To select a structure, choose a factory preset having the desired struc-
ture, and, if you wish, edit it to create a user preset.
Two-Band is a versatile structure that can be configured to provide purist, phase-
linear processing. When correctly configured it can be used for protection limiting
and we provide two presets that use it for this. It is also used for the
CLASSICAL-2
BAND
presets.
Five-Band is the basic structure used for popular music in its many variations. Be-
cause it provides effective automatic re-equalization of program material, it is also
used for news, talk, and sports.
The stereo enhancer, AGC, equalizer, and “back end” clippers are common to both
Two-Band and Five-Band processing and therefore stay the same when the 8600Si
switches between two-band and five-band operation. However, different controls
appear in the screens containing dynamics processing controls, as appropriate for