isn't this just a binaural thing? i'm a bit skeptic about the page because it just sounds like big words with little meaning: "Right and left auditory input is combined in the brainstem's superior olivary nucleus and routed to the reticular formation that, in turn, uses neurotransmitters to initiate changes in neurological activity in the thalamus and cortex." it's just lots of tongue rolling to say sound changes brain activity (and perhaps impress the unknowing buyer?)

there's lots of great info about light and sound machines out there, but i'd keep away from these "new-age-esque" pages, i have a feeling most of them just rip off people (like wellnesstools, which has a VERY BAD history, keep away from that one!)

which reminds me about a nice light-machine project, i'll post a new thread right away