Carefully analyze the waveform you are using before beginning the mastering process. Take note of any large peaks in the wave crests. These spikes in the waveform could be an indication of clipping. Clipping occurs when the incoming signal overloads the input device being used. Listen back to this section of material, checking for distortion. If you hear any audible destruction of the waveform, you will need to record the vocals again.
Select the vocal track and open Pro Tools' graphic equalizer. Unlike the equalizer found in Logic or Reason, Pro Tools' utilizes knobs to adjust the individual regions of the harmonic spectrum. If your vocal track has overwhelming bass frequencies, gently reduce the bass, or "low," frequency level in the equalizer. This should add increased clarity to your track. To apply the changes, you must confirm your changes within the window before returning to the track.
Raise the mid-range frequency knobs within the equalizer if your vocal track lacks depth or warmth. Conversely, reduce the mid-range frequency knobs if your vocal tracks seem muddled or blurry. Press the "preview" button to hear the results of your modifications.
Decrease the high-range frequencies of your vocal track if you hear harsh, abrasive tones as the result of sibilance, or harsh tongue attacks on consonant syllables. No amount of mastering or mixing can completely rid your track of these flaws, but this equalization technique can significantly reduce their presence.
Open Pro Tools' mixer and adjust the volume of your vocal track in such a way that it can be heard distinctly over the other material in your production. Use the automation features within the mixer and audio track to "record" volume adjustments you feel are necessary throughout the duration of the track. It is not uncommon to incorporate a large amount of volume automation into a single track.