auto-tune

auto- +‎ tune, a trademark registered to Antares Audio Technologies.

auto-tune (uncountable)

1. (music) An audio processor that corrects the pitch of a recorded track, also used to distort vocals in electronic music.

auto-tune (third-person singular simple present auto-tunes, present participle auto-tuning, simple past and past participle auto-tuned)

1. (transitive) To tune (an engine, industrial process, etc.) automatically.
2. (music) To correct the pitch of a vocal or instrumental performance.

• autotuner
• the Cher effect