Board Thread:General Discussion/@comment-30976757-20180611234233/@comment-53539-20180612194929

Autotune at its core acts as a pitch corrector, if your vocal is mostly good the "correction" isn't much. Its only when they go wild and make the synth have to fill in extreme cases that you get that digital noise effect. You can use it for minor adjustments and never have it really impact the voice. Its very commonly used for the music industry and yet for the most part unnoticeable until you do that extreme stuff.