Music

So I was thinking that music might be able to be considered a "virtual world," possibly used to communicate. It would be very easy for someone to create anything from a complex song to a simple beat, that would be able to have a message encoded into it using the beat or word patterns. This would be a very good tool for people to communicate messages that may have a sensitive or secret meaning, and communicate it to a large base of people. It would be very interesting to devise a code using some type of musical element and communicate using it, or even see if any previously recorded songs adhered to the code and had any messages within the music. I dont know. Just a thought.