lots of audio programs call themselves "editors", but when it comes down to the business of using software to REALLY rearrange the subtleties of recorded audio, Melodyne is head and shoulders above the rest. The videos on Celemony's site show quite a few ways the program can be used in a studio (far more than just fixing a bad note in a vocal track, but it can do that too)

The Celemony videos:
http://www.celemony.com/cms/index.php?id=videos