What program is needed to autotune a sound?

To autotune a sound, you can use digital audio workstation (DAW) software that includes pitch correction plugins, such as Ableton Live, Logic Pro, or Pro Tools. Additionally, dedicated autotune software like Antares Auto-Tune or Celemony Melodyne can be used for more advanced pitch correction and manipulation. These programs allow you to adjust the pitch and timing of audio recordings to achieve a polished sound.