Optimod-Surround 8685 V1.0 Operating Manual - Orban
Optimod-Surround 8685 V1.0 Operating Manual - Orban
Optimod-Surround 8685 V1.0 Operating Manual - Orban
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OPTIMOD SURROUND PROCESSOR OPERATION 3-17<br />
Basic Modify<br />
BASIC MODIFY allows you to control two important elements of <strong>8685</strong> processing:<br />
the equalizer and the dynamics section (multiband compression, limiting, and clipping).<br />
At this level, there is only one control for the dynamics section: LESS-MORE,<br />
which changes several different subjective setup control settings simultaneously according<br />
to a table that we have created in the <strong>8685</strong>’s permanent ROM (Read-Only<br />
Memory). In this table are sets of subjective setup control settings that provide, in<br />
our opinion, the most favorable trade-off between loudness, density, and audible<br />
distortion for a given amount of processing. We believe that most <strong>8685</strong> users will<br />
never need to go beyond the LESS-MORE level of control because the combinations<br />
of subjective setup control settings produced by this control have been optimized by<br />
<strong>Orban</strong>’s audio processing experts on the basis of years of experience designing audio<br />
processing and upon hundred of hours of listening tests.<br />
Unlike other the LESS-More controls in most other <strong>Optimod</strong>s, the <strong>8685</strong>’s LESS-MORE<br />
control is designed to always maintain the target loudness that the active Dialnorm<br />
value specifies. In general, the LESS-MORE control sets the average amount of dynamic<br />
range control provided by the processing, although the spectral balance also<br />
changes in some of the “radio-style” presets. As you go from less to more, the loudness<br />
of loud sounds will stay about the same but the loudness of quieter sounds will<br />
increase. Because of the <strong>8685</strong>’s sophisticated gating circuits, very quiet material like<br />
background sounds, quiet underscoring, hiss, and hum will not be pumped up.<br />
You need not (in fact, cannot) create a sound entirely from scratch. All User Presets<br />
are created by modifying Factory Presets or by further modifying Factory Presets<br />
that have been previously modified with a LESS-MORE adjustment. It is wise to set<br />
the LESS-MORE control to achieve a sound as close as possible to your desired sound<br />
before you make further modifications at the Advanced Modify level. If you do so,<br />
any changes you make at this level are likely to be smaller and to require resetting<br />
fewer controls.<br />
In the <strong>8685</strong>, LESS-MORE affects only the dynamics processing (compression, limiting,<br />
and clipping). Unlike some of <strong>Orban</strong>’s older digital processors, the <strong>8685</strong>’s equalization<br />
and stereo enhancement are decoupled from LESS-MORE. You can therefore<br />
change EQ or stereo enhancement and not lose the ability to use LESS-MORE. When<br />
you create a user preset, the <strong>8685</strong> will automatically save your EQ and stereo enhancement<br />
settings along with your LESS-MORE setting. When you recall the user<br />
preset, you will still be able to edit your LESS-MORE setting if you wish.<br />
Please note that when a given Factory or user processing preset’s DIALNORM setting is<br />
GLOBAL, the <strong>8685</strong>’s global DIALNORM setting automatically scales its loudness at the<br />
<strong>8685</strong>’s output. If you want a given preset to produce a predictable loudness level in<br />
a non-Dolby transmission environment (particularly when the preset is exported to<br />
other <strong>8685</strong> units), you should set the processing preset’s DIALNORM value to something<br />
other than GLOBAL. This will always override the active Setup’s global DIALNORM<br />
setting. (See Low-IM Look-Ahead Limiter on page3-13 for a discussion of the series<br />
connection of the DIALNORM and LIMITER DRIVE controls.)