For this comparison we have taken an acapella and shifted it down by a Major 3rd and then up by a Major 3rd (-/+ 4 semitones). Vocals are notoriously difficult to pitch shift without radically changing the character of the voice (the "frog" or "chipmunk effect").
The unprocessed file is listed first in the MP3 player.
To see the larger view of each plug-in, click on the thumbnail.