Algorithm Weaves Secret Messages into Dance Music

In Ibiza, an island in the Mediterranean Sea, the hypnotic “thump thump thump” of the club music could actually convey much more than a call to dance.

Krzysztof Szczypiorski, a researcher from Poland, has developed a technique to hide messages inside dance music using subtle variations in tempo. By raising or lowering the speed of the music at levels not detectable by humans, he transmits a series of Morse code-like signals that can be picked up by a computer program. The sonic dots and d

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