Dr Jamie Ward, of the University College London (UCL) Department of Psychology, and others there have been working on music research using human subjects with a rare condition known as synaesthesia. Synaesthesia is is a neurological condition in which two or more bodily senses are coupled (Wikipedia) and manifests itself as, as examples, seeing images when music is played or experiencing a taste when reading a word. Fascinating, isn't it? To find out more on synaesthesia or participate in the research (if you have this condition), see the UCL Psychology site.
(Hat tip: scenta musci and news)