Have you ever heard a song and been reminded of other songs? Some folks have created a new type of search engine which allows you to upload your favorite song and then analyzes the frequencies and characteristics of the song in order to provide similar matches. I tried it on a few tracks and sometimes it is pretty close. It's a fun way to search for similar sounding music or audio samples, and makes you wonder what it is (sonically) that makes songs unique.
Hoo hoo! Like a search owl