What's the name of the site that finds patterns in music?

I'm looking for the site. I just found out about it yesterday, but I can't remember the name, and searches have been unsuccessful. The site lets you search, find music, play it, and it will find sections of a song that are very similar and jump to those sections while the song is playing. It also has settings to change how often it switches and things like that.

Update:

http://infinitejukebox.playlistmachinery.com/ is the site. I guess it won't let me pick my own answer as best.

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