Song Tapper
Some undergraduates simplified the problem of music search into rhythmic pattern search, and then formulated _that_ as a string matching problem, of all things. Surprisingly, it actually sort of works. (For example, it correctly identified "Eine Kleine Nachtmusik". Not quite sure how this made it into AAAI this year (there's no learning component, it's all string matching, at least at the time the paper was written), but it is pretty cool, especially because the web site includes a Flash-driven demo that allows you to test it out yourself.
Song Search By Tapping: the original Java applet and a link to the (two page) paper.
Some undergraduates simplified the problem of music search into rhythmic pattern search, and then formulated _that_ as a string matching problem, of all things. Surprisingly, it actually sort of works. (For example, it correctly identified "Eine Kleine Nachtmusik". Not quite sure how this made it into AAAI this year (there's no learning component, it's all string matching, at least at the time the paper was written), but it is pretty cool, especially because the web site includes a Flash-driven demo that allows you to test it out yourself.
Song Search By Tapping: the original Java applet and a link to the (two page) paper.