Double-click the icon for your preferred music production program to open it; for example, Mixcraft or Logic.
Click "File," "Open Recent" and select a song for editing from the drop-down menu. This opens the song in the mix interface, giving you access to individual audio tracks.
Click the "S" icon next to the vocal track you have selected for editing. This mutes all other audio tracks in the session so you can listen to the Auto-Tune edits in isolation.
Click "Effects" and select "Auto-Tune." If you haven't got the official Auto-Tune plug-in, use the generic alternative in your music production program. For example, in Mixcraft this is called "GSnap" and in Logic it is called "Pitch Correction." All programs function in the same way, by manipulating the pitch of a note and adjusting it within preset parameters.
Click on "Input Type" and enter the vocal register that is furthest from your own. For example, if you are baritone, type in "Soprano." This "tricks" Auto-Tune into moving the input note into a completely new register, from low to high. This creates a large jump in pitch which the human voice can rarely achieve so instantly, producing a computerized sound.
Set "Correction Mode" to "Auto." There are two correction modes; the other is "Graphic," which lets you manually adjust individual notes. In "Auto" mode, the software interprets the note and measures it against its own chromatic pitch reference, in the way a guitar tuner would measure the pitch of a note. It then adjusts any note that is not chromatically perfect to the nearest chromatically perfect note. Since you've "tricked" Auto-Tune into thinking the input note is supposed to be in the soprano range, Auto-Tune will adjust the note to the nearest correct pitch in that range.
Drag the virtual dial downward to set the "Retune Speed" parameter to zero. This makes all pitch corrections instant, removing any natural modulation from the voice and creating a computerized sound reminiscent of Cher's "Believe."