Antares Autotune v4.39 VST-AiR 
Hailed as a "holy grail of recording" by Recording magazine, Auto-Tune 4
is a multi-platform plug-in that corrects intonation problems in vocals or solo
instruments, in real time, without distortion or artifacts, while preserving all of
the expressive nuance of the original performance with audio quality so pristine
that the only difference between what goes in and what comes out is the
intonation. Over a typical pitch correction range, it is simply not possible to
tell that a sound has been processed, except that it is perfectly in tune.
More information:
_www.antarestech.com