ATEIS IDA8C - Manual (Page 289)

Components of Audio Processor 289
© 2012 ATEÏS
Determine the maximum of automatic gain.
Limit the max gain to keep a natural audio dynamic.
Attack Time
Adjust the fade in time needed to reach the target level.
A short time will give an uncomfortable hearing, with audio peak when the speaker begins to
talk.
Release Time
Adjust the fade out time of the signal when AGC is no longer working. This value is ignored if the
“Release button” is not pushed.
A short time will give an uncomfortable hearing, with audio slack between the speaker's
words.
Sampling Time
Average time needed by measurement input level.
A too long time will cause the AGC become insensitive on short peaks.
Level
Level of the gain that AGC increase or decrease the input signal.
Example
As example, we want to automatically adjust the gain of a kind of vocal microphone.
On the "Input A" component, the input sensitivity is set to -40dB for standard dynamic microphone.
Threshold: Set at -25dB. The level is adjusted only when the input signal is above -25dB. This is to
keep a natural dynamic.