[Doug]

I was reading about audio illusions a while back, just a sec - I'll wiki it... hmmm can't seem to find it now... Anyway, there is a famous auditory psycholigist who has studied the psychology of auditory perception. She found that the incidence of perfect pitch may be more prevalent than earlier imagined and that people who have tonal languages as a first language are much more likely to have perfect pitch. Tonal languages, like chinese, Japanese (to a certain extent), Greek ad others alter the meaning of words based on the inflection of the syllables.