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1、HowComputersKnowWhatWeWant-BeforeWeDoHere’sanexperiment:trythinkingofasongnotasasongbutasacollectionofdistinctmusicalattributes.Maybethesonghaspoliticallyrics.Thatwouldbeanattribute.Maybeithasapolicesireninit,oraprominentbanjopart,orpairedvocalharmony,orpunkroots.Anyoneofthosew
2、ouldbeanattribute.Asongcanhaveasmanyas400attributes-thosearejustafewoftheonesfiledunderp.ThiscuriousideaoriginatedwithTimWestergren,oneofthefoundersofanInternetradioservicebasedinOakland,Calif.,calledPandora.Everytimeanewsongcomesout,someoneonPandora’sstaff-aspeciallytrainedmus
3、icianormusicologist-goesthroughalistofpossibleattributesandassignsthesonganumericalratingforeachone.Analyzingasongtakesabout20minutes.ThepeopleatPandora-norelationtothealienplanet-analyze10,000songsamonth.They’vebeendoingitfor10yearsnow,andsofarthey’veamassedadatabasecontaining
4、detailedprofilesof740,000differentsongs.WestergrencallsthisdatabasetheMusicGenomeProject.Thereisapointtoallthis,apartfromsettlingbarbetsaboutwhichsonghasthemostprominentbanjopartever.ThepurposeoftheMusicGenomeProjectistomakepredictionsaboutwhatkindofmusicyou’regoingtolikenext.P
5、andorausestheMusicGenomeProjecttopowerwhat’sknowninthebusinessasarecommendationengine:oneofthosepiecesofsoftwarethatgivesyouadviceaboutwhatyoumightenjoylisteningtoorwatchingorreadingnext,basedonwhatyoujustlistenedtoorwatchedorread.TellPandorayoulikeSpoonandit’llplayyouModestMou
6、se.TellityoulikeCajunaccordionvirtuosoAlphonse“BoisSec”Ardoinandit’lltryyououtonsomeIryLeJeune.EnoughpeopleliketellingPandorawhattheylikethattheserviceadds2.5millionnewusersamonth.Overthepastdecade,recommendationengineshavebecomequietlyubiquitous.Attheappropriatemoment-generall
7、ywhenyou’reabouttoconsummatearetailpurchase-theyappearatyourshoulder,whisperingsuggestivelyinyourear.Amazonwasthepioneerofautomatedrecommendations,butNetflix,Apple,YouTubeandTiVohavethemtoo.Inthemusicspacealone,Pandorahasdozensofcompetitors.Agoodrecommendationengineisworthaloto
8、fmoney.AccordingtoareportbyindustryanalystForrester,on
