The Auto-Tracking EQ effects track the frequencies of the notes from the generators they are assigned to. This works automatically as soon as you insert the effect into the mixer. The Auto-Tracking EQs allow you to fix problem frequencies in sounds. Suppose you have a bass line and there's a problem frequency when you play a "C" at 243 Hz. Now if you fix that with a traditional EQ, you'll have to use another EQ if you play a "D" for instance, because traditional EQs are static, they don't move along with the sounds played. So if you play 5 different notes, you need 5 different EQs! Not to mention the hassle of computing all the right frequencies manually. The auto-tracking EQ does all this for you. It gives you direct access to the fundamental frequency and first partial(s) of a sound, which are typically the problem frequencies since they are the strongest components in the frequency spectrum.