From Hits to Niches?
    ...or how popular artists can bias
music recommendation and discovery


                   Òscar ...
ACM KDD // 2nd netflix workshop // 2008 // òscar celma  pedro cano




                The problem
ACM KDD // 2nd netflix workshop // 2008 // òscar celma  pedro cano


music overload
• Today(August, 2007)
      iTunes: 6...
From hits to niches? ...or how popular artists can bias music recommendation and discovery
From hits to niches? ...or how popular artists can bias music recommendation and discovery
From hits to niches? ...or how popular artists can bias music recommendation and discovery
From hits to niches? ...or how popular artists can bias music recommendation and discovery
From hits to niches? ...or how popular artists can bias music recommendation and discovery
From hits to niches? ...or how popular artists can bias music recommendation and discovery
From hits to niches? ...or how popular artists can bias music recommendation and discovery
From hits to niches? ...or how popular artists can bias music recommendation and discovery
From hits to niches? ...or how popular artists can bias music recommendation and discovery
From hits to niches? ...or how popular artists can bias music recommendation and discovery
From hits to niches? ...or how popular artists can bias music recommendation and discovery
From hits to niches? ...or how popular artists can bias music recommendation and discovery
From hits to niches? ...or how popular artists can bias music recommendation and discovery
From hits to niches? ...or how popular artists can bias music recommendation and discovery
From hits to niches? ...or how popular artists can bias music recommendation and discovery
From hits to niches? ...or how popular artists can bias music recommendation and discovery
From hits to niches? ...or how popular artists can bias music recommendation and discovery
From hits to niches? ...or how popular artists can bias music recommendation and discovery
From hits to niches? ...or how popular artists can bias music recommendation and discovery
From hits to niches? ...or how popular artists can bias music recommendation and discovery
From hits to niches? ...or how popular artists can bias music recommendation and discovery
From hits to niches? ...or how popular artists can bias music recommendation and discovery
From hits to niches? ...or how popular artists can bias music recommendation and discovery
From hits to niches? ...or how popular artists can bias music recommendation and discovery
From hits to niches? ...or how popular artists can bias music recommendation and discovery
From hits to niches? ...or how popular artists can bias music recommendation and discovery
From hits to niches? ...or how popular artists can bias music recommendation and discovery
From hits to niches? ...or how popular artists can bias music recommendation and discovery
From hits to niches? ...or how popular artists can bias music recommendation and discovery
From hits to niches? ...or how popular artists can bias music recommendation and discovery
From hits to niches? ...or how popular artists can bias music recommendation and discovery
From hits to niches? ...or how popular artists can bias music recommendation and discovery
From hits to niches? ...or how popular artists can bias music recommendation and discovery
From hits to niches? ...or how popular artists can bias music recommendation and discovery
From hits to niches? ...or how popular artists can bias music recommendation and discovery
From hits to niches? ...or how popular artists can bias music recommendation and discovery
From hits to niches? ...or how popular artists can bias music recommendation and discovery
From hits to niches? ...or how popular artists can bias music recommendation and discovery
From hits to niches? ...or how popular artists can bias music recommendation and discovery
From hits to niches? ...or how popular artists can bias music recommendation and discovery
From hits to niches? ...or how popular artists can bias music recommendation and discovery
From hits to niches? ...or how popular artists can bias music recommendation and discovery
From hits to niches? ...or how popular artists can bias music recommendation and discovery
From hits to niches? ...or how popular artists can bias music recommendation and discovery
From hits to niches? ...or how popular artists can bias music recommendation and discovery
From hits to niches? ...or how popular artists can bias music recommendation and discovery
From hits to niches? ...or how popular artists can bias music recommendation and discovery
From hits to niches? ...or how popular artists can bias music recommendation and discovery
From hits to niches? ...or how popular artists can bias music recommendation and discovery
From hits to niches? ...or how popular artists can bias music recommendation and discovery
From hits to niches? ...or how popular artists can bias music recommendation and discovery
From hits to niches? ...or how popular artists can bias music recommendation and discovery
From hits to niches? ...or how popular artists can bias music recommendation and discovery
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From hits to niches? ...or how popular artists can bias music recommendation and discovery

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This paper presents some experiments to analyse the popularity effect in music recommendation.
Popularity is measured in terms of total playcounts, and the Long Tail model is used in order to rank music artists.
Furthermore, metrics derived from complex network analysis are used to detect the influence of the most popular artists in the network of similar artists.

The results from the experiments reveal that, as expected by its inherent social component, the collaborative filtering approach is prone to popularity bias. This has some consequences on the discovery ratio as well as in the navigation through the Long Tail.
On the other hand, in both audio content-based and human expert-based approaches artists are linked independently of their popularity. This allows one to navigate from a mainstream artist to a Long Tail artist in just two or three clicks.

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From hits to niches? ...or how popular artists can bias music recommendation and discovery

  1. From Hits to Niches? ...or how popular artists can bias music recommendation and discovery Òscar Celma, Pedro Cano (Music Technology Group ~ UPF) (Barcelona Music and Audio Technologies, BMAT) 2nd netflix workshop // ACM KDD / Las Vegas, US // August, 24th 2008
  2. ACM KDD // 2nd netflix workshop // 2008 // òscar celma pedro cano The problem
  3. ACM KDD // 2nd netflix workshop // 2008 // òscar celma pedro cano music overload • Today(August, 2007)  iTunes: 6M tracks / 3B Sales  P2P: 15B tracks  53% buy music on line • Tomorrow  All music will be on line  Billions of tracks  Millions more arriving every week • Finding new, relevant music is hard!

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