Find to Melodyne (like Waves Tune or Polyverse Comet). Explain how to use the free trial for a specific project.
It lacks the advanced sibilant detection and "Melodic" algorithm improvements found in version 5, which separate pitched vocal sounds from breath/noise automatically.
. While revolutionary at its release, this specific version is now significantly outdated compared to the current Melodyne 5 Key Features (Version 2.1) DNA (Direct Note Access)