[average~] :) u can calculate the differences between rms and normal peak to provide dedicated level control i guess . ive never done that but i saw the compressors logic where "you are" controlling it automatically with reversed ratio - because you want to affect quiet signals not peaks
ps:if there are some objects.patches.externals i would also like to know
There's a loudness output in analyzer~, downloadable at the CNMAT site. (There's also a standalone loudness object.) You'd have to compensate for the delay inherent in the analysis, but that should get you started.