There is a wide range of sensitivity to the emotional power of music, ranging from virtual indifference at one extreme (Freud
was said to be indifferent to music, and never wrote about it), to a sensitivity that can barely be controlled. Individuals
with Williams syndrome, for example, though they have severe visual and cognitive defects, are often musically gifted, and
usually extravagantly sensitive to the emotional impact of music. I have seen few sights more extraordinary than a group of
40 young people with Williams syndrome breaking into uncontrollable weeping at tender or sad music, or uncontrollably excited
if the music is animated.