The "Melodic" algorithm automatically detects and separates pitched vocal sounds from unpitched, noise-like components like sibilants ("s" and "t" sounds) and breaths.
This analysis provides a more natural-sounding intonation correction by focusing on the "pitch center" as perceived by the human ear.
Melodyne 5 Studio is built on several proprietary technologies that allow you to edit audio as if it were MIDI data: