Synesthesia is a medical condition which effects the brain and how it processes sensory information, this means that people who have it will often experience more than one sense at a time when faced with a certain factor. For example if they were to experience a piece of music or perhaps just daily mundane sounds, simultaneously to hearing that they might also experience visual forms of colour or the feeling of texture. Essentially it is the combination and blending of sensory experiences and Synesthesia itself has a wide number of different types.