this is a very general question about the autogain function in most dynamic (vst) plugins.
I was trying a new compressor yesterday and thought “ok, there it is again…”, after comparing the input vs. the output level, i saw that the output was always 1db higher, then the input (which isn´t too bad compared to other plugins).
I´m an audio engineer and in my understanding/world the auto gain function should automaticly provide the same level at the output as it comes in the input to make sure, when you compare the effected signal with the dry one, you´re not “blinded” by the psychoacoustic louder=better thing.
Now my question, which comes up every time i stumble upon another auto gain :
A) , that i don´t get it right and auto gain is a function for another purpose and i was tought wrong ?
B) , really just a advertisment trick to fool (new) users into thinking “wow, it´s suddenly soooo loud” ?
C) , that there is a unsolved mystery in programming, which makes it impossible to automaticly compare and even out 2 levels ?
[I´ve been told, that people sometimes don´t get my humor, so i want to make clear, that option C) is only added for ironic purposes. Also the whole topic is kind of ironic, because the answer is obvious, but i would like to have it confirmed by an developer, without calling any brand out of course.]