Omnia Audio Omnia.ONE - Manual (Page 55)

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Pres Band AGC (Presence Band AGC)
See description of settings for Low Band AGC
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 Xover (Crossover) section on Page 35.
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.”