UPDATED VERSION (2011): http://www.slideshare.net/plamere/music-recommendation-and-discovery As the world of online music grows, music 2.0 recommendation systems become an increasingly important way for music listeners to discover new music. Commercial recommenders such as Last.fm and Pandora have enjoyed commercial and critical success. But how well do these systems really work? How good are the recommendations? How far into The Long Tail do these recommenders reach? In this tutorial we look at the current state­of­ the­art in music recommendation. We examine current commercial and research systems, focusing on the advantages and the disadvantages of the various recommendation strategies. We look at some of the challenges in building music recommenders and we explore some of the ways that MIR techniques can be used to improve future recommenders.

14. introduction:: sources of new music

17. introduction:: commercial interest

25. formalization :: the whole picture

26. formalization :: describing users & items

27. formalization :: describing users & items USERS ITEMS

28. formalization :: describing users & items semantic gap USERS ITEMS

65. formalization :: describing items :: text Fun with metadata

106. music recommendation:: algorithms

137. problems:: Social recommenders:: Cold Start

138. problems:: Social recommenders:: Feedback Loops The Shins The Postal Service The Shins The Postal Service The Shins The Postal Service

139. problems:: Social recommenders:: Popularity Bias

154. problems:: Social recommenders Strange Connections

155. problems:: Social recommenders If you like Gregorian Chants you might like Green Day If you like Britney Spears you might like...

165. Last.fm Charts examples:: Social music

168. examples:: Social music Last.fm – web services http://ws.audioscrobbler.com/1.0/artist/Deerhoof/toptags.xml <toptags artist=&quot;Deerhoof&quot;> <tag> <name>indie</name> <count>100</count> <url>http://www.last.fm/tag/indie</url> </tag> <tag> <name>experimental</name> <count>94</count> <url>http://www.last.fm/tag/experimental</url> </tag> <tag> <name>indie rock</name> <count>60</count> <url>http://www.last.fm/tag/indie%20rock</url> </tag> <tag> ... </tag> </toptags>

185. evaluation

192. http://mainstream.vincentahrend.com/