Synesthesia - colorful music

Synesthesia, a condition mentioned in passing by Dr. Robson in a lecture, causes senses to be confused caused by (mis)connections in the brain. The condition is thought to be genetic and this article describes research (by someone with synesthesia) that links the synesthesia to specific chromosomes:[http://www.cnn.com/2009/HEALTH/02/09/synesthesia.genes/index.html]. I thought it was actually pretty interesting.