What is algorithm behind the recommendation sites like last.fm, grooveshark, pandora?

Question

I am thinking of starting a project which is based on recommandation system. I need to improve myself at this area which looks like a hot topic on the web side. Also wondering w

Answer 1

There's a good demo video with explanation (and a link to the author's thesis) at Mapping and visualizing music collections. This approach deals with analyzing the characteristics of the music itself. Other methods, like NetFlix and Amazon, rely on recommendations from other users with similar tastes as well as basic category filtering.