Omnia 6FM, Инструкция по установке и эксплуатации

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Omnia 6 Use and Installation Guide – Version 1.00a
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Multiband Limiter Windows
Limiter Submenu – SL Limiter shown as example
The controls in these adjustment windows are similar in function to the previously described AGC stages.
However, there are only four controls for the limiters. The Attack and Release controls work similarly to
the AGC sections, but are of course much faster on overall action. There are also two new parameters as
well. The first is the
Hold Thresh old. This control sets the threshold where the limiter’s Hold algorithm
begins when it detects pauses in the audio. When it’s in the OFF position, the limiters will attack, and then
release completely, just as you would expect them to. With Hold Thresh old enabled, the limiters will
momentarily stop and rest during very short pauses, especially during live speech. Functionally, this is
similar to how the
Gate function works in the preceding AGCs. The other control is Limit Thresh old . This
control sets the threshold where audio peak limiting begins. Care is needed when adjusting this control
because
raising the threshold (counter-clockwise) causes less limiting to occur, and the resulting
uncontrolled peak energy will go to the clipper instead. Thus, with this control you can artistically trade off
the dynamic limiting against brick wall clipping, as each has its own "sound."
As the limiter threshold is lowered by turning the Limit Thresh clockwise, the peak output level of the
limiter is reduced. The signal in that band won't hit the clipper as hard, and you'll notice more action on the
limiter bargraph for that band. In fact, instead of reducing the output of one of the audio bands in the Final
Mixer section, you could instead “dynamically reduce” the level in that band (which also increases density
in that band) by lowering the limiter threshold.
When adjustments are made to limiter thresholds, start by making adjustments in 0.5dB steps. Reducing the
threshold too much can cause the system to create an effect that “sucks out” the frequencies in that band.
Conversely, the opposite (raising the threshold) will create an exaggerated effect by over-enhancing certain
frequency ranges, as well as causing increased distortion, since excessive levels from that band will reach
the following clipper stage. Usually, the limiter thresholds are adjusted as a "fine polish" on the final sound.
If you are unsure about how to use the
Limiter Thresh olds, then we recommend that they be left at their
well-researched factory settings. I