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Design Guide for the Polycom SoundStructure C16, C12, C8, and SR12
5 - 34
dynamics processing, fader, delay, and mute. The acoustic echo canceller is
also in this signal path but should not be enabled for non-microphone audio
sources.
Once the conferencing ungated type is selected in the channels page as shown
in the following figure, the ungated signal path may be selected in the matrix
as shown in the following figure. This selection chooses the conferencing
ungated signal path and allows the user to enable noise cancellation on that
input signal.
Automatic Gain Control (AGC)
Automatic gain control is used to automatically adjust the gain of audio sig-
Mic or Line
Input
Input to
Matrix
Input to
Matrix
Parametric
Equalization
A/D
Converter
Analog
Gain
Acoustic Echo
Cancellation
Noise
Cancellation
Automatic
Gain Control
Automixer
AGC Dynamics Fader Delay
Fader
Automixer
Automixer
Delay
Automatic
Gain Control
Non Linear
Processing
Feedback
Cancellation
Dynamics
Processor
Dynamics
Processor
Fader
Input to
Matrix
Automatic
Gain Control
Fader Delay
Dynamics
Processor
Delay
Mute
Router
Recording/
Ungated
Conferencing
Sound
Reinforcement
UNGATED - Conferencing Processing
Parametric
Equalization
Acoustic Echo
Cancellation
Noise
Cancellation
Automatic
Gain Control
Fader Delay
Non Linear
Processing
Dynamics
Processor
Mute