"With a little help from the internet, young people getting high off of "digital drugs,"
... these "digital drugs" use "binaural, or two-toned technology to alter your brain waves and mental state," producing a "state of ecstasy" for the user." (The Huffington Post)
"Kids around the country are getting high on the internet, thanks to MP3s that induce a state of ecstasy. And it could be a gateway drug leading teens to real-world narcotics." (Wired)
"'Binaural beats', apparently used "as a way of achieving a simulated mood or experience", are the subject of legal measures in each country" (Mixmag News)
"The effect produced by binaural beats was first discovered in 1839 by Prussian scientist Heinrich Wilhelm Dove and later gained public attention over claims the effect could be used for medicinal purposes, including for relaxation, meditation and other mental states.
Claims that the beats can produce a narcotic-like effect are disputed." (The Daily Star)