Apply DRC (Dynamic Range Compression) in ac3 to Aac (eac3to)

[levi5]

Okay, i am encoding ac3 5.1 to Aac 2.1
i know how to pipe eac3to in neroAacEnc
Here is the code i am using:

eac3to "inputfile.ac3" stdout.wav -downDpl | neroaacenc -q 0.36 -ignorelength -if - -of outputfile.aac

Sound is almost perfect but i think its sometimes a little louder (which sounds good to me) and sometimes quieter.
So I was wondering if i could normalize or apply drc to the audio file
I have googled a lot but couldn't find what i want
so how do i apply drc to the audio ?

[Selur]

You could the pipe eac3to output to sox, do your normalization/drc stuff inside sox and then pipe the sox output to nereoaacenc.
(collected a few drc example settings here)