Indeed, I've always been a metal and hard rock fan, with a lot of my favorite music being older/questionable/noisy recordings, one thing that has always held true in my car, is the fact that this type of music must sound good with my final tune. This is why I love the multi-switch option with the apl.....I can setup curves aimed at different types of materials, over top of all the corrections, and reach over an flip on the fly!