Music theory: Want to drive your roommate out of his/her mind?

... or tune your instrument to standard pitch?

Or hear the relationships between the major, Dorian, Mixolydian and natural minor modes?

Use the Flash Piano ap on Benjamin Hollis' website "The Method Behind the Music." Says Hollis, "We have created a virtual piano that you can use to play scales and intervals to help your understanding of these and other topics. You can even play a tune!"

http://method-behind-the-music.com/piano