Getting song Names in Itunes lidrary - 3rd Party Software

Hi, I have just converted my son to Apple from Windows.

We have been able to get his music files set up BUT a lot of his songs show Unknown artist and song name.

Is there a program that will play the song and figure out it's name and artist and rename it in his Itunes library. He has over 300 songs like this.

I used a program ages ago ( I think it was called Rinse? to find and remove duplicate songs.

There is an iOS app called Shazam that is remarkable at doing this but I don't know of any way to incorporate the info it finds into iTunes except by hand.

Obviously, any songs "ripped" from legal CDs and bought from iTunes would already have the correct info.