Short for EQualization, these controls allow you to shape the sound of audio by increasing or decreasing the gain of various frequencies. For example, our Tone feature for vocals adds high frequency and reduces low frequency to add crispness and reduce mud in the signal, making vocals sound more like they would in a recording studio. For more information on Equalization see: Wikipedia Equalization Heres a handy chart that shows which instruments and sounds occupy various frequency ranges: Independent Recording Network Interactive Frequency Chart