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OV AGC Drv (Overall Multiband AGC Drive)
Adjusts the overall amount of drive to all four bands of the 4-Band AGC section simultaneously
over a + / - 6 dB range. Higher settings will increase the overall amount of compression and the
"dynamic EQ" effect of the 4-Band AGC. This can make the program material sound more
consistent. Be careful though because too much compression can cause the program material to
sound less natural and cause low-level noise in the program material to be brought up.
OV Lim Drv (Overall Limiter Drive)
Adjusts the overall amount of drive to all four bands of the multiband Limiter section
simultaneously over a + / - 6 dB range. Higher settings will increase density. This can increase
loudness but be careful because too much gain reduction in the limiters can lead to a "wall of
sound" effect that can cause the program material to sound "smashed". This can also cause
additional artifacts to be generated in the following codec. Lower settings will reduce the density,
providing a more "open", natural and dynamic sound.
<-Exit
Click on this option to return to the Adjust Processing submenu.
Low Band 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 so as not to allow later stages to be overloaded during the time when the AGC is
adjusting the level downwards. Likewise, extremely fast attack times (especially when combined
with very slow release times) can "punch holes" or overreact to the band of audio being processed.
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'.
Gt Thresh (Gate Threshold)
When the input audio falls below a certain level, the gain control action of the AGC stage is
"frozen" by the gate. The level at which this freeze, or hold takes place is controlled by the setting
of the Gate Threshold control. Higher numbers cause the gate to activate at higher audio levels. In
most applications this control should be adjusted to cause gating action to occur when the input
audio falls about 20dB below nominal. The action of gate also prevents noise rush-up during
periods of no audio or during pauses in speech.
RTZ Speed (Return To Zero Speed)
RTZ stands for Return To Zero. What RTZ does is return the gain of the AGC band to the selected
amount of gain reduction (See RTZ Level below) in the absence of audio. RTZ speed controls
how fast this adjustment takes place – i.e., how long it takes the AGC to move to the target RTZ
level.
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