About The Processing Structures - Orban Optimod-FM 8300 Operating Manual

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OPERATION

About the Processing Structures

front panel). The PC Remote application also allows you to archive pre-
sets to your computer's hard drive (or other storage device) and to re-
store them. However, archiving a preset is not the same as saving it. Ar-
chived presets reside on a storage medium supported by your computer,
while saved presets reside in the 8300's local non-volatile memory. You
cannot archive a preset until you have saved it. (See To back up user pre-
sets, system files, and automation files onto your computer's hard drive
on page 3-65.)
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
pear. After you have saved the preset, reverse the edit and save the pre-
set again.
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
esting, but you do not need to understand it to get excellent sound from the 8300.
In the 8300, a processing structure is a program that operates as a complete audio
processing system. Only one processing structure can be active 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), the 8300's DSP hard-
ware could realize several possible processing structures. Unlike an analog system,
where creating a complete processing system involves physically wiring its various
components together, the 8300 realizes its processing structures as a series of high-
speed mathematical computations made by Digital Signal Processing (DSP) inte-
grated circuit chips.
There are three basic structures: Two-Band, Normal Five-Band, and Ultra-Low-
Latency Five-Band. To select a structure, choose a factory preset having the desired
structure, and, if you wish, edit it to create a user preset.
Two-Band is a purist, phase-linear structure. When correctly configured, it can be
used for protection limiting and we provide a preset that uses it for this. It is also the
basis for the CLASSICAL-2 BAND presets. It can have higher latency than the five-
band presets (up to 23 ms).
Optimum Five-Band is the basic structure used for popular music in its many varia-
tions. Because 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 8300
switches between two-band and five-band operation. However, different controls
appear in the screens containing dynamics processing controls, as appropriate for
Two-Band or Five-Band multiband compression. The meters also change functional-
ity to display the Two-Band or Five-Band gain reduction.
-M , then you may still find the material inter-
ESS ORE
ORBAN MODEL 8300
button ap-
P
AVE RESET