From Boing Boing:
Created by Audanika in Germany, SoundPrism is a stunning interface that immerses the user in a relaxing, meditative music making experience. The iOS app, most impressive on iPad, is incredibly intuitive, generating an alluring grid of glowing tiles whose colors represent pitch.
But while it’s easy for total non-musicians to make stunning melodies, the interface design is steeped in some deep musical theory. The SoundPrism tiles are arranged in a Circle of Thirds, a symmetric model that the app’s musician developers believe is a fantastic method for teaching basic harmonic theory.
In fact, if you’re a music theory geek, Audanika created a harmony theory blog to explore the “symmetry model” embodied by their app.