I have a C-Media PCI audio card. The software comes with an equalizer. Lately, I have had to lower the levels for frequency 30-120 down more than I normally would have. It used to be fine, Normally, I have them set to 30, 18DB; 60, 16DB; 120, 15DB; 250, 6D; 500, 0; 1K, 1DB; 2K, 3DB; 4K, 10DB...