Open the Auto-Tune program plug-in. Click "Effects," and select "Pitch Correction." There are similar pitch-correction programs that come bundled with recording software. If you don't have the Auto-Tune, search online for a program named "Pitch Corrector" or "Auto-Correct," which feature almost identical functions and effects as Auto-Tune.
Select a key. Auto-Tune works by increasing or decreasing the pitch of your note to the nearest pitch in the key. Click "Key," and select a key from the drop-down menu. Auto-Tune prompts you to select a note by clicking on a keyboard graphic. The note that you select is the desired starting note of the audio. For example, if you select C, the first note in the corrected audio automatically is manipulated to create a C.
Adjust the "Scale Detune" parameter by moving the virtual slider dial. While perfect pitch may be desirable, an absolutely faultless vocal may sound a little robotic and processed. The "Scale Detune" parameter determines the threshold of pitch deviation to be corrected. If you set it low, it only corrects notes that stray widely off the mark. Notes that are almost in tune are unchanged.
Adjust the "Retune Speed" parameter, which determines how quickly a sharp or flat note is corrected. If it's set high, the original note instantly jumps to the correct note. This setting conceals any pitch errors, but it does so at the expense of any natural expression in the audio. For example, if you sing with vibrato, any note deviations that give character to your vibrato are neutralized. For natural-sounding vocals, set the "Retune Speed" to between 10 and 50 milliseconds.
Save the settings as a "Preset." Click "Menu," and select "Save User Preset As." When prompted, type a name for the setting, such as "Perfect Pitch Vocals." Call up this setting whenever you want to add pitch correction to a vocal take.