The MELODIA plug-in automatically estimates the pitch of a song's main melody. More specifically, it implements an algorithm that automatically estimates the fundamental frequency corresponding to the pitch of the predominant melodic line of a piece of polyphonic (or homophonic or monophonic) music.
You can find out more about the plug-in and download it here: http://mtg.upf.edu/technologies/melodia
(http://mtg.upf.edu/system/files/projectsweb/melodia_icon.png)
Cheers,
Justin