noynekkerThe Melodyne version that comes with Sonar is Melodyne Essential, and it doesn't include Pitch Drift or Vibrato adjustments. Melodyne Essential does have a stand alone mode, but it is still limited to very basic monophonic pitch control function. You would have to upgrade to Melodyne Editor to get what you're looking for.
noynekkerCraig, I verified this information on the Celemony website, there is a feature comparison chart for all the different Melodyne products, and it says no vibrato or pitch drift with Essential. http://www.celemony.com/en/melodyne/functions