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Automatic Gain Control (AGC) Module
Automatic Gain Control is used in zone applications to keep the average level of a signal constant. Think of it as a slow
reacting compressor/upward expander. It accomplishes this by allowing you to set a target level and a window size around the
target (the window size sets how much the signal level is allowed to deviate from the target). The algorithm will then add gain
when the signal level drops below this window. The LOW THRESHOLD and MAX GAIN parameters prevent large amounts
of gain from being applied when no signal is present. A faster-acting limiter is included in the algorithm to quickly limit signals
which exceed the ceiling of the window, thereby preventing clipping and distortion and keeping the signal level within the
window.
AGC modules can be inserted in either the input or mid processing insert slots, see ‘Configuring Processing Module
Insert Types’ on page 25 for more information on configuring inserts. The following section provides a description of
each of the AGC module parameters and how to edit them.
To edit an AGC module:
1. Press the EDIT button.
2. Select an AGC module using the
SELECT wheel and UP/DOWN
buttons. Press the SELECT wheel
to enter the module’s menu.
3. Use the SELECT wheel and UP/
DOWN buttons to navigate the
menu and edit parameters.
TIP:
When in a menu, pressing and holding the EDIT button for approximately 2 seconds will advance to the next module
below in the configuration map, wrapping around through the available modules. This allows quick navigation between menus
of a column and improves efficiency when performing repetitive tasks within like modules.
AGC Parameters
•
AGC [OFF, ON]
Turns the AGC module on and off.
•
TARGET [-40dB - -10dB]
This parameter sets the desired average output level. If the average level of the signal rises above the set target, the
level will be reduced. If the average level of the signal is below the target, gain will be added.
• MAX GAIN
[1dB - 20dB]
This parameter adjusts the maximum amount of gain that can be added by AGC.