One more note

As a follow up to the last post. Wikipedia has a link about these binaural beats. It even has audio samples. Feel free to give them a listen. If any website played sounds like this, I'd go elsewhere in a hurry. Not to mention that for these sounds to have any affect, you have to use headphones. This is the least worrying thing I've ever come across. But hey, worry if you want to! It's a free country, so they say.