and to tie it back to science, i had a graduate student at uc-berkeley who came to work with me at mcgillhis doctoral dissertation, he wanted to study the extent to which we can understand what musicians are doing by looking at them, observing their movement. it is worth pointing out that there cannot be any music without movement, no sound without movement. sound is the molecules in the air vibrating in particular ways. there is no sound in a vacuum because there are no molecules to vibrate. all sound, including music, has to begin with some motion, movement. in the case of movement, -- music, it is the body moving, somebody pressing a key, striking, blowing, plucking. even singing, there is movement of air through the vocal cords. what bradley did is he took performances of musicians, in this case, a clarinetist playing stravinsky, and we had people come into the laboratory and we turn off the sound. as they listened, they had to write what they heard going on emotional and structurally. a different group of people came in and they had the sound on and the video off. a third group had b