Using Dynamics Processors - Polycom SoundStructure C16 Design Manual

You can adjust the range of the AGC by expanding the AGC control and adjusting the maximum and
minimum gains. By default, the maximum and minimum gain are set to 6 and -6 respectively on microphone
and telephony signals.
The maximum AGC value specifies the maximum amount of gain the AGC can apply to increase the input
signal level as the AGC tries to reach the SoundStructure nominal signal level.
The minimum AGC value specifies the maximum amount of attenuation the AGC can apply to attenuate the
input signal as the AGC tries to reach the SoundStructure nominal signal level.
If the input is a stereo virtual channel, the AGC gain for both underlying left and right physical channels uses
the same gain, ensuring that the stereo image is preserved.
To operate the AGC with a target level different from 0 dBu:
1 Set the AGC minimum and maximum range to the desired range
2 Adjust the input fader to the desired target level above or below the 0 dBu nominal signal level of the
SoundStructure devices.
This allows the AGC to adapt to the 0 dBu nominal level and the fader settings offset the 0 dBu level
to the setting on the fader.

Using Dynamics Processors

Dynamics processors, also known as non-linear processors, are used to reduce the dynamic range, or
amplitude, of input or output signals and are often used on sound reinforcement systems to prevent clipping
audio amplifiers. Dynamics processors are similar to automatic gain controllers, but are typically faster
acting and can be used with program audio and other fast changing input signals.
SoundStructure devices include the following styles of look-ahead dynamics processing:
● Peak Limiter
● Limiter
● Compressor
● Expander
● Gate
The SoundStructure Studio user interface for adjusting the dynamics settings are shown in the following
figure.
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