ATEIS UAPg2 - Manual (Page 197)

UAPG2 MANUAL
Version EN.24
197
Example of AGC using:
As example, we want to automatically adjust the gain of a kind of SM58 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.
Target level: We want a final target level at -10dB.
Maximum gain: Set at 10dB, because giving more gain will generate some uncomfortable level
differences.
Release time: Set at 800(ms), enough time to avoid hard transition when the speaker talks again,
after a little break.
Attack time:
Set at 400(ms), enough time to avoid hard transition when the speaker begin to talks,
and not too long because we want a stable level quickly (not since the middle of the
sentence).
AVG time: Set at 200(ms), not too long, to detect short peaks in the speech and to be
responsive. Not too short to avoid level change too often.
You can see on the vu-meter that when the speaker talks at 18dBu, the final level is around -10.5dBu:
Input level:
AGC level: RMS vu-meter:
AGC in AGC out