Paranoized wrote:
Very true (Well, I dont look at the wave myself, I just keep an eye on my VU meters, and most of the time i have a limiter to take out the +0 peaks on the master)... but 2 tunes can look equally loud in de soundwave, while one could sound alot louder...
Mid range boosting. Human ears are optimised to hear midrange. So if you boost midrange through the roof, your tune 'sounds' louder. If it sounds better, is another question altogether

Best you can do if you play out mp3's, is normalizing them before you put them in your crates. Most tunes you buy on the internet will already be normalized as part of the mastering. Dubs and mp3's made by producers themselves, might get a little added gain from normalizing them.
btw: that gain-knob on your mixer serves a purpose!