synesthesia and cymatics

synesthesia is a concept that I have always been fascinated by, but never quite understood.  My best friend in high school was a synesthete, and for her, every number had a different color.  It was a hard concept for me to grasp and even harder for her to explain, but watching the TEDtalk about synesthesia made it a little more clear.  The concept of connecting one sense with another is one that I would like to see explored more in art, much like the woman who painted songs, and I think film would be the perfect medium to experiment with.  I'm going to be honest, before the last class period I had never heard of cymatics outside of a physics class, which is strange because I've been a musician all my life and sound is my favorite aspect of film.   The concept of sound as pure energy that has the capability to create tangible patterns, and as something you can physically feel is very interesting to me, and also something I would like to experiment with at some point.  I feel that synesthesia and cymatics are quite similar in the fact that they combine one sense with another in an unexpected way.