Power on your mixer or graphic equalizer pedal if you are using a hardware tool. If you are using an equalizer pedal, plug your instrument directly into the '"Input" port on the pedal using your instrument cable. Connect your recording equipment directly to your mixer if your graphic equalizer is one of several hardware units routed to your mixing board. Either method will allow your graphic equalizer to receive and manipulate audio. If you are not using graphic equalizer software, proceed directly to Step 3.
Open your digital audio workstation (DAW) and import the audio you plan to equalize. Most DAWs incorporate a graphic equalizer tool in their interface. Follow the instructions provided with your DAW to create a graphic equalizer and assign it to the audio track you wish to modify.
Use the vertical sliders on your hardware or digital equalizer to raise and lower the volume levels of individual frequency ranges within your audio track. Although there is theory behind correct equalization, certain basic principles will allow you to begin refining your audio. If your audio sounds unfocused or muddy, gently raise your upper mid-range frequencies (1 khz to 2.5 khz). This should add clarity to instrumental and vocal lines. Lower the frequencies between 28 and 320 Hz to reduce the level of bass. Excessive bass may cause your track to distort or clip. Slightly augment the frequencies between 14.4 and 17 khz to add a polish or "shine" to your audio.