each channel on a typical mixing board has it's own EQ. Used correctly, these can be adjusted to convey that instrument or vocalist with as natural a presentation as possible......My personal philosophy has always been, "Less is Better!" with regard to signal manipulation. To me the best results are always accomplished with a really good setup in the studio, and as little after-tweeking as possible.
I agree fully. I am not advocating that people use tone controls at +18 db to correct for a terrible room or system. All I am saying is that "Used correctly, tone controls can be adjusted to convey the music with as natural a presentation as possible - in a given room/setup" and "correctly" means very lightly - perhaps +/-3 db tilt at the most in a good setup (room/gear) or to suity personal taste.
Used correctly, a tone control (or even one set flat to 0 db) does not destroy, IMHO