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High Band AGC
See description of settings for Low Band AGC
Low Band Limiter
LFLim Drv (Low Frequency Limiter Drive)
Adjusts the drive level to the individual Limiter band. Used when you desire more or less density
in a specific band. These Limiter Drive controls can also be used as secondary dynamic EQ
controls after the Drive controls in the AGC Xover.
To adjust the overall amount of density, use the Overall Limiter Drive control in the Xover
section. See "OV Lim Drv" in the
LFLim Att (Low Frequency Limiter Attack)
The attack control adjusts how fast the limiter responds to sudden increases in audio level, and
higher numbers equate to faster response times. Faster attack times reduce the transient nature of
the input audio, while slower attack times improve it. Extremely slow attack times must be used
with caution so as not to allow the following Clipper stage to be overloaded during the time when
the limiter is adjusting the level downwards.
LFLim Rls (Low Frequency Limiter Release)
The release control adjusts how fast the limiter recovers from periods of more gain reduction when
the input audio levels fall. Faster release times (higher numbers) result in a more dense sound.
Even though the Omnia uses program controlled release algorithms, setting the control for
extremely fast release times while driving the limiter hard can result in 'pumping' as well as
extremely dense-sounding (fatiguing) audio. Also, setting the control for extremely slow release
times (especially when combined with fast Attack times) can cause the limiter to "hang" after a
transient, failing to fully recover and "punching a hole" in its band of frequencies.
LFLim Hold (Low Frequency Limiter Hold Threshold)
During operation of the limiter, the algorithm is watching for very small decreases in audio level,
such as what occurs right after a sudden peak. When this occurs, the limiter release is temporarily
stopped. The result is a drastic reduction in intermodulation distortion and a more open sound,
even though the audio is still quite dense. The level at which the hold takes place is controlled by
the setting of the hold Thresh control. Higher numbers cause the hold to activate at higher audio
levels. The action of limiter hold also works in conjunction with the preceding AGC gates to
reduce noise rush up during periods of no audio or pauses in speech.
Lim Thresh (Limiter Threshold)
This control sets the threshold where audio peak limiting begins. Lower settings will increase the amount of
limiting and decrease the level going to the following Bass Clipper (low band only) or main Clipper stage.
Conversely, higher settings will raise the limit threshold, causing less limiting but feeding more level into
the following Bass Clipper (Low band only) or main Clipper stage. (Mid, Presence and High bands)
Care is needed when adjusting this control because higher settings will cause less limiting to
occur, and the resulting uncontrolled peak energy will go to the following clipper stages 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, (made more negative) 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
Xover (Crossover)
section on Page 44.
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