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Ask HN: How does Pandora's rating system work?
Does anyone know how Pandora's rating system works? Specifically what algorithms are in use?
- teej 17y agoEach song is classified according to the Music Genome Project (http://en.wikipedia.org/wiki/Music_Genome_Project http://en.wikipedia.org/wiki/Music_Genome_Project). The song's genes are rated according to how strongly they are expressed on a 1-5 scale. They break down your song ratings into ratings of certain genes and groups of genes (focus traits) and pick a new song that rates highly in the genes you "like". They also account for lemons on a band-level and song-level basis. If you negatively rate a song, they won't play it again on that station. If you negatively rate a band twice, they won't play that band again on that station.
- apu 17y agoDoes this mean that someone at Pandora/Music Genome Project have to listen to every single song they have in their library? Or do they now have automatic classifiers to identify the "genes" of a song?
- teej 17y agoFrom what I understand, they have a real person sit through each song an classify it.