I hear a lot of pumping and breathing. What is the proper way to use AGC?
There are at least two things you can do to use the AGC block more effectively and achieve smooth transitions between widely varying source material volumes. • First, use a one or two filter PEQ in the independent Side-chain input to band-limit the signal feeding the AGC’s detector. A high-pass filter set around 150 to 200 Hz will work wonders to eliminate pumping due to excess low frequency energy, such as kick drums in music program material or plosives in speech material. • Second, try adjusting the Gain Increase rate and/or Gain Decrease rate to more moderate values. This is similar to adjusting the attack time of a compressor/expander, and allows for more of the original dynamics of the program material to pass through unaffected.
