When I tutor people who are studying for bar or bat mitzvah, I record the tropes, the traditional chants, myself each time. That way, I can sing in a key that student can easily follow. I also use a simple, less cantorial style that's easy to pick up.
Sometimes, though, it's convenient to go on line and hear how other people chant the tropes. So, here are links to a variety of places on the web where you can listen to the tropes and study them:
Ezra Katz, learntrope.com
Ellie's Tropes, http://ellietorah.com/
Cantor Ofer Barnoy, http://www.bethsholom.com/prayer/torah-trope.shtml
Cantor Jack Chomsky, http://www.tiferethisrael.org/Resources/TorahTropes/T_Trope1.htm
There are also commercially produced tools for teaching and learning tropes, and you'll find many of them at http://www.amazon.com/s?ie=UTF8&keywords=torah%20trope&page=1&rh=i%3Aaps%2Ck%3Atorah%20trope.