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In multi-channel audio applications, microphones are often treated as a special input
device, capable of triggering automated ducking , where the volume of other inputs
automatically drop to preset levels, allowing microphone audio to be the dominant
source. Accordingly, when a Mic On button is selected the Level setting for the active
microphone channel is changed to a Threshold setting, which is the microphone gain
threshold at which automated ducking of other channels initiates.
Note that the
microphone threshold setting can be set manually, using the and Thresh-
buttons, or automatically, using the Scan Level button for the appropriate (i.e.,
microphone) channel.
Note: While monitoring for microphone input levels (typically, but not necessarily on
channel 4), the system searches only the LEFT side. Hence single channel microphones
must be connected to the LEFT side input or plugged into a input set to operate in mono
mode.
After defining the ducking threshold level, one must also set the setback level of the other
audio inputs, using the existing, yellow S and Setback buttons.
Finally, the Mic restore pull down defines the amount of time the amplifier waits between
the end of an active microphone signal and resetting the other channels to their normal
volume levels.
1.3.2 Master Out
Note: The amp waits 2 seconds after power on until output is enabled.
The settings on the Master Out menu bar determine audio output from the
CA
device.
1. Channel Pull Down
use the pull down to switch between available
input channels.
Change from Level to
Thresh when Mic On
Define ducking levels for
non-microphone inputs
