“A Swiss musician sees colours when she hears music, and experiences tastes ranging from sour and bitter to low-fat cream and mown grass, astounded scientists say. Zurich University neuropsychologists were so intrigued by the case of ES, a 27-year-old professional musician whose full name has been withheld, that they recruited her for a year-long inquiry. They say she is the world’s most extreme known case of synaesthesia, the phenomenon whereby hearing music triggers a response in other sensory organs.”