Tapping Musical Memory

Ever have a song stuck in your head, but you can't quite name the tune? A new tool developed by three students at Simon Fraser University, in British Columbia, may be able to help.

The Song Tapper, at http://www.songtapper.com, allows users to tap a beat on the space bar and get a list of possible titles in response. The site evolved from a project last year for an artificial-intelligence class and now gets as many as 10,000 hits a day.

"We wanted to do something that involved

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