new mastering technique: listen to your tracks on a system with the tweeters disabled. then listen to them again on a system with NO bass. really gives you perspective on how well your mids can support your tracks on other system- and when most peoples’ mastering techniques focus more on cultivating high sounds and then low sounds than they do on really shaping out those mid-range melodies and details, focusing those groups a bit seriously brings a lot of sound issues into perspective.