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Pre
-processing
HPF (High Pass Filter)
The high pass (low cut) filter allows you to remove subsonic energy from the input audio prior to
further processing. In so doing, intermodulation distortion performance of the processor and the
audio path following it are improved, and processing resources are not wasted processing
inaudible sounds that have no acoustically relevant information. The filter is third-order (18 dB
per octave) below selectable frequencies of 20, 30, 40, 50 or 60 Hz. It can also
be bypassed (not
recommended).
Phase Rot (Phase Rotator)
The phase rotator improves waveform symmetry for program material that is highly asymmetrical
in nature. Examples of such programming are the human voice, and sources with non-sinusoidal
waveforms such as certain string and wind instruments, as well as certain sounds created by
electronic synthesizers. By removing waveform asymmetry from the input program material,
cleaner processing results because any limiting that occurs is able to work equally on both positive
and negative excursions of the audio waveform.
Wideband AGC (Automatic Gain Control)
The wideband AGC rides the incoming audio levels like an automatic “hand on the fader”, keeping the average level
more consistent for the following 4-Ban
d AGC stage, enabling it to stay in its “sweet spot”.
WB AGC (Bypass, Engage)
The wideband Automatic Gain Control (AGC) stage can be bypassed if desired, although more
consistency is achieved when this stage is used.
AGC Drv (AGC Drive)
This control adjusts the amount of drive to the wideband AGC stage. Increasing the drive causes
deeper compression to be achieved, and deeper compression allows quieter passages in the input
audio to be raised further than if lesser drive (and less compression)
was used.
AGC Att (AGC Attack)
The attack control adjusts how fast the AGC 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 because allowances must be made in later stages to not overload them during the time
when the broadband AGC is adjusting the level downwards.
AGC Rls (AGC Release
)
The release control adjusts how fast the AGC 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 can result in ‘pumping’.
