Wide Band Agc (Wb) (Advanced Tab) - Omnia .11 Installation And Operation Manual

Wide Band AGC (WB) (Advanced Tab)

Touch the WB button and then the Advanced tab to display the advanced controls for the Omnia.11's smart
Wideband AGC section. There are 4 variable controls and 2 drop-down controls located in the WB AGC Advanced
tab menu area:
WB AGC Menu (Advanced Tab)
RTP Level: RTP stands for Return to Platform. What RTP does is return the gain of the AGC to the selected
amount of gain reduction or "platform level" in the absence of audio. This control adjusts the "resting" or "platform"
gain reduction level the AGC will return to when audio pauses or stops (while gated).
The primary purpose of RTP is to prevent the AGC gate from increasing the gain unnecessarily or holding the gain
too low during pauses in audio, which could result in an increase in noise level or unexpected sudden increase in
level when the audio returns.
RTP Speed controls how fast the adjustment to the platform level (set with the RTP Level control above) takes
place – i.e., how long it takes the AGC to move to the target RTP gain reduction level. Range is from "0" (slow) to
11 (fast).
Makeup Gain sets the amount of gain to be filled in during quieter, softer program passages. The range is "0.0"
(off) to "11" (maximum). This function is also program dependent, and it interacts somewhat with the main Attack
and Release time constants. As the attack/release times are modified, the system also scales the Make-Up Gain time
constants. Use less makeup gain for processing more faithful to the source material; use more makeup gain for
greater loudness and "density" (a more "compressed sound).
Filter Freq (High-pass Filter Frequency): This drop-down control adjusts the cutoff frequency of the built-in
high-pass (lo-cut) filter. Available settings are "Out" (not recommended), "20 Hz", "30 Hz" and "40 Hz". A setting
of at least "20 Hz" is suggested for most formats to keep sub-sonic signals from affecting the processing
performance.
Ratio: This variable control adjusts the overall compression ratio of the Wideband AGC. Available settings range
from 2:1 to 10:1. Lower ratios will let more dynamics through to the following multi-band AGC section and are
preferred for most applications. A good starting point for most popular music formats is 3:1 or 4:1. These will
provide very smooth, smart, hand-on-the-pot level control. The 2:1 ratio is very gentle and may be preferable for
classical music or jazz. Higher ratios are useful primarily for talk programming or anywhere there is a desire to have
tighter control over very dynamic program material and/or a more processed sound. NOTE: Higher ratios can cause
the WB AGC to "overreact" on denser program material such as modern popular music, especially with faster attack
times and slower release times, so use with caution. Keep in mind that there is another 5-Band AGC section that
follows, so more gentle control at this stage is normally preferred.
Window: At a setting of "0.0" the Wideband AGC
acts like a "regular" AGC where the gain is always
either increasing or decreasing.
Lower settings turn the window function on and
open up a "zone" within which the gain can rest
and actually do nothing!
When the window setting is on, the audio can drop
by the dB value of the selected setting before the
AGC reacts.
This can greatly help preserve natural program
dynamics without compromising overall gain-
riding ability. Try settings of -3 to -6dB to start.
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