Does any1 know how to tweak the knobs if im looking for basically sounds from metal bands like a7x, bullet or trivium..im using my line 6 pod x3 live and i cant seem to get it rite.. Sumtimes it sounds muddy.. Other times it doesnt blend in with the bass and the drums.. So here goes.. I have 6 knobs.. Drive, presence, treble,mids, bass,reverb... Basically im looking for the sound which enables me to play riffs and sum guitar leaks.. Like for example bullet for my valentine.. Thanx for ur help!