Test your musical ear

There's a cool site that lets you test your musical ear. You listen to 36 different tunes and each tune is played twice. After each "pair" has played you have to tell it whether you heard two identical or different tunes. It's a simple idea, but cool at the same time. I got 80.6% on it :(

Anyways here's the link:

Test your musical skills in 6 minutes