Auto-Tune is an audio processor created by Antares Audio Technologies, which uses a proprietary device to measure and alters pitch in vocal and instrumental music recording and performances through use of a phase vocoder.
In other words; if you suck at singing, auto-tune will make your voice sound like an angel’s choir.
However, this invention made Time Magazine’s 50 worst inventions! Time Magazine describes it as “a technology that can make bad singers sound good and really bad singers sound like robots. And it gives singers who sound like Kanye West or Cher the misplaced confidence that they too can croon”.
Time Magazine isn't the only one that criticizes auto-tune. There are several newspapers, shows and even artists report it's negative impact on the music industry. There are many singers and bands that have also hit out at it!