New Media Technology Omnia ONE Multicast - Manual (Page 34)

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’.
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 WB AGC section to an
internally determined amount of gain reduction 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
platform level.
<-Exit
Click on this option to return to the Adjust Processing submenu.
Enhancers
Deep Bass
Adds ‘girth’ to the audio by enhancing very low frequencies such as kick drum fundamentals or
very low bass notes that may be present in the input audio program.
Phat Bass
An Omnia exclusive, Phat Bass adds harmonic overtones to the lower bass frequencies. The
addition of these overtones causes small speakers to seem to produce bass response that they are
OmniaONE Multicast - Use and Operation Manual – Version 0.90
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