“Pop stars and punk bands alike are piping their voices through the hardware, which corrects and improves their vocal pitch during concerts and on records. With musicians on the road touring for weeks on end, the autotuner has become a safety net that catches the occasional clinker on days when their voices may be off. (In a nutshell, the autotuner is told what key the vocal is in and analyzes the wave form in real time. If the singer is off-key, it will adjust the pitch to the closest note in that key.)”