Idea: mob app Soundville

Here's an idea for mobile app that can be called “Soundville”.

When you look at any object through the screen of a smart phone, these objects would start producing unique music. Each object is assigned an individual music note, i.e. a tree plays # Do, a house # C, a person # Sol Major or Minor), etc.
If you are looking at a picture that contains say 15 objects, they together will produce a self-harmonizing tune consisting of 15 individual sounds.
On the other hand if you point the camera on a single object, you will hear only one tune. Also, for instance, when you point at a tree and then quickly sweep across to a pond with a duck, you’ll hear the tree, the pond with a duck and everything else that was captured in between.