Automatic Gain Control (AGC)
Automatic Gain Control (AGC) is a nonlinear process, usually applied to waveforms containing two or more signals, such as a telephone conversation where one signal source is considerably weaker than the other.
A significant increase of intelligibility can be obtained by proper selection of the parameters of the AGC function. As each of the applications requests its own parameter settings due to different recording conditions, the settings cannot be generalized. Nevertheless the default settings, as displayed above, have proven to be a reasonable starting point.