Current audio equalization techniques include Shelf, Parametric, and Graphic Equalizers. They are prevalent in all professional and commercial audio implementations. These techniques modify spectral components within specified bands by applying gain or attenuation. However, current techniques each have inherent issues with their use. The issues of concern are dynamic spectrum input and the degradation of Signal-to-Noise Ratio (SNR). In the former, the input spectrum is not static, yet all the current implementations of equalization are. The equalization must be dynamic and “track” the input signal spectrum to be effective. In the case of SNR, output noise is increased when no signal is present in the spectral band when adding gain. In addition, current techniques do not posses the precision required to only encompass the signal spectral components. in an evolution of equalization with input tracking capability, signal spectral components are identified; all other spectrum may be considered as noise and can be attenuated. The evolution of audio equalizers has progressed that negates the stated issues. Its implementation is realized in the Harmonic Tracking Equalizer (HTEq). Emulations of current techniques with improvement, noise reduction, and spectral modification will be presented.