Gian Beeli, Michaela Esslen, and Lutz Jäncke, researchers in Zurich, have described a professional musician with both music-color and music-taste synesthesia: “Whenever she hears a specific musical interval, she automatically experiences a taste on her tongue that is consistently linked to that musical interval.” In a 2005 article in Nature, they detailed her associations:
Minor second - Sour;
Major second - Bitter;
Minor third - Salty;
Major third - Sweet;
Fourth - (Mown grass);
Tritone - (Disgust);
Fifth - Pure water;
Minor sixth - Cream;
Major sixth - Low-fat cream;
Minor seventh - Bitter;
Major seventh - Sour;
Octave - No taste.