Synaesthesia

Neuropsychologists at the Zurich University have been conducting research on a Swiss musician who has the world's most extreme case of synaesthesia.

Synaesthesia is the condition where a response is triggered in other sensory organs when music or certain sounds are heard. The 27-year-old female musician sees colors and develops tastes when hearing certain pitch intervals.

For example, she sees red when she hears a C, and purple when she hears an F-sharp. A minor second interval makes her mouth sour, and a major second makes it bitter. A minor third interval tastes salty, and a major third tastes sweet.

This sounds like a rather interesting phenomenon. I'd like to meet someone with this condition some day and ask them more about their musical experiences.