@EdgeOfEpsilon: I'm glad you asked...
What other player gives you the ability to "save" individual eq and pre-amp level settings for each individual song, other than WINAMP???
With "Auto EQ", you can save independant settings for each individual song, and they will always adjust to the saved setting, then resort back to the default setting or new setting for next song selection.
As a DJ, I continually "tweak" the eq settings for all the music in my playlists, so the music will eventually all mix together nicely, without one song being heavy in bass, and another being overbearing with highs!
The pre-amp level can also be saved for songs that "sound" lower or higher, to be leveled where you'd like.
One of Winamps most awsome features (for my use)!