A screenshot of the Auto-Tune software. The red wavy line traces the frequency of Renee Montagne's voice as she sings. The yellow line shows her altered voice -- corrected in the places where it wandered from the right pitch.
For those with less-than-perfect singing voices, technology offers help. A number of computer programs can correct pitch to make just about anyone sound in tune -- even NPR's Renee Montagne, who lends her voice to show how the software works.
Some of today's pop songs — like Cher's "Believe" — are deliberately overcorrected for pitch to create a stylized sound. Hear what NPR's Renee Montagne sounds like when this technique is applied:
Hear Renee Montagne Sing 'Ain't No Sunshine'
The technology has become quite prevalent in the music industry, finding its way into many of today's pop recordings -- and some classical ones, as well. NPR's David Kestenbaum reports.