Slashdot Mirror


Going Head To Head With Genius On Playlists

brownerthanu writes "Engineers at the University of California, San Diego are developing a system to include an ignored sector of music, dubbed the 'long tail,' in music recommendations. It's well known that radio suffers from a popularity bias, where the most popular songs receive an inordinate amount of exposure. In Apple's music recommender system, iTunes' Genius, this bias is magnified. An underground artist will never be recommended in a playlist due to insufficient data. It's an artifact of the popular collaborative filtering recommender algorithm, which Genius is based on. In order to establish a more holistic model of the music world, Luke Barrington and researchers at the Computer Audition Laboratory have created a machine learning system which classifies songs in an automated, Pandora-like, fashion. Instead of using humans to explicitly categorize individual songs, they capture the wisdom of the crowds via a Facebook game, Herd It, and use the data to train statistical models. The machine can then 'listen to,' describe and recommend any song, popular or not. As more people play the game, the machines get smarter. Their experiments show that automatic recommendations work at least as well as Genius for recommending undiscovered music."

16 of 174 comments (clear)

  1. So, not at all? by BadAnalogyGuy · · Score: 5, Informative

    It's well known that radio suffers from a popularity bias, where the most popular songs receive an inordinate amount of exposure. In Apple's music recommender system, iTunes' Genius, this bias is magnified. An underground artist will never be recommended in a playlist due to insufficient data. ...
    Their experiments show that automatic recommendations work at least as well as Genius for recommending undiscovered music

    So, not really so much at all...?

  2. Re:Wow. by Red+Flayer · · Score: 4, Insightful

    Now I've tried all possible music sites and playlist generators, but at the end of the day I simply never really agree with the correlation they see between song one and song two.

    I know you say you've tried all possible music sites... but on Pandora if you create a new station from an artist or song, they'll give you the criteria they use to populate the playlist.

    Set up stations based on enough songs, and it's pretty easy to understand at least part of how their algorithm works. A big problem, of course, is that some of the criteria are somewhat subjective, which is why you may disagree with them. I find this especially true when creating stations based on artists, not songs.

    I just wish I could tweak the individual conditions to see where it'd get me... like having all criteria match except genre.

    --
    "Trolls they were, but filled with the evil will of their master: a fell race..." -- J.R.R. Tolkien on Olog-hai
  3. Re:Sponsored herd-it advertisment? by Toonol · · Score: 4, Insightful

    Very possibly, but even if it's totally non-commercial there's still valid reasons for wanting to track where your traffic is coming from. It's probably marketing of some kind, but maybe not sold and paid for.

  4. Re:They should go through my collection... by cayenne8 · · Score: 4, Interesting
    I would welcome this type of tech.

    I love music, but, alas...I'm getting older, and am stuck in classic rock. Funny...they weren't classic when I started listening to them..haha.

    But seriously, even I'm getting a little weary of listening only to the Stones, Zeppelin, etc over and over and over again...

    I really love any kind of good guitar driven, bluesy, riff-laden rock. Guitar blues...etc.

    I have to guess even in this modern, splintered genre world, there is still some of this type of music being put out by new kids. I've found Wolfmother, and really like that...but, that was a recommendation I got from a friend, but, I don't have the time to find music out there.

    When I grew up...it came through the radio. Music wasn't nearly as splintered and specialized as it is today. On my 'rock' stations, I heard Stones, Zeppelin, AC/DC, Steely Dan, Fleetwood Mac, Kansas, Beatles...hell even older than that you'd even hear an occasional John Denver or Olivia Newton John song....quite a mix without turning the dial.

    Today on the radio, you have to tune stations all over to get each type of music it seems...and I just can't seem to find something with enough mix to keep my interest. And hit radio...same shit all the time, no variation.

    People suggest the internet...well, most of my time is at work, and most places i work..won't allow you to stream music from the web, it is blocked. So, that's not my option.

    I've recently discovered Pandora on the iPhone...I have started finding things like that I like from that.

    I guess, more things like this and the tech mentioned in the article would really be a blessing for me if I could throw that one while at work, but, would have to be through the phone I guess since no streaming on work computer.

    --
    Light travels faster than sound. This is why some people appear bright until you hear them speak.........
  5. for some, 'good' and 'popular' are the same by lapsed · · Score: 4, Insightful

    More precisely, popular causes good. Norms cause people to want to act the same way. Some people will listen to music because of its artistic appeal and others will listen to a specific type of music to distinguish themselves from the norm in some way. But the crowd will want to listen to what the crowd listens to *because* that's what the crowd is listening to. Nobody wants to take from the long tail exactly because there's nobody paying attention to the long tail.

  6. Re:It's time to put it to a vote: by Anonymous Coward · · Score: 5, Funny

    The wisdom of the crowds seem to be proving you wrong.

  7. The Academic meets Capitalism by antirelic · · Score: 4, Insightful

    Capitalism: Hello there Academic. How are you?

    Academic: Hi... what they heck are you? You look so strange to me...

    Capitalism: I'm Capitalism. Oh, I'm really not all that strange, but I might be a little complicated to understand.

    Academic: Complicated!?! I am the master of complicated, I am an Academic for crying out loud.

    Capitalism: Ok then. Let me try to explain myself. I am a system that provides stuff via supply and demand.

    Academic: Nonsense! I dont hear music that deserves to be heard on the radio or on popular websites!

    Capitalism: Deciding who deserves what really isnt my thing... see... its about supply and demand...

    Academic: But who decides whats in demand!?! Certainly it cannot be the uneducated "masses", they... just aren't qualified!

    Capitalism: No no... its about what many individuals, smart or otherwise, want based on need or dozens of different other factors.

    Academic: Preposterous! How could they possibly know what they want or need if they havent been exposed to it?!? Foolish Capitalism!

    Capitalism: Well, there are a lot of musicians out there and only so many different ways to get them heard, and, well, there are people out there who spend their lives learning what people like and dislike, and even they arent always right... so the best at determining who does best succeeds...

    Academic: Rubbish! What we really need, is for the qualified, with a broad base of tastes to make an application for people to give them a view of all the music that is out there!

    Capitalism: I guess you can try, no one can stop you, but you might not succeed.

    Academic: Your so short sighted. I don't need to worry about succeeding, I receive public money to pursue my higher realm of thinking.

    Capitalism: Right on... so I guess you will compete and regardless if your product sucks, you dont have to worry about it because your really just spending someone elses money.

    Academic: Its progress my dear boy. Progress.

    --
    20th century Marxism is not progress...
  8. Re:Bias exists for a reason by hansraj · · Score: 4, Insightful

    Are you generally this obtuse?

    The idea is not to popularize shitty bands. Given perfect AI, this program is supposed to do the following:

    1) Listen to all popular music (for various classes of popular).
    2) Figure out why that music is popular (for its class).
    3) Listen to any *new* track and figure out if it is like those popular tracks (and any popular class).

    Now of course we don't have that kind of AI and hence all this research.

    The idea is to promote good bands that would have been popular except for the fact that they are not already popular and hence might go unnoticed.

  9. Re:They should go through my collection... by SlashdotOgre · · Score: 4, Informative

    Actually I've found last.fm's recommendation system works extremely well; so well in fact that I constantly have a tab open to it when I'm browsing music stores like eMusic (eventually I want to write a little app for this purpose using last.fm's API, but I digress). For those unaware, last.fm users submit what they're listening to through automated plugins (and the supported apps list is huge and very platform independent, I personally use both Amarok 1.4 and MPD); one of the things last.fm does with this music is identifies your "neighbors" (people with similar lastes, i.e. 8 of our top 10 artists are identical). I've found that one of the best ways to find new music is by browsing what my neighbors are listening to and checking out any of their top bands that I'm not familiar with. They also list related artists by correlating this information (e.g. the majority of users who have Band A as a favorite artist also like Band B). Another useful feature is being able to check what an artists most played songs are (great for when it's an artist you never heard of). With that said, I'm definitely interested in seeing what recommendations come from this UCSD team (and not just because I'm an alumnae) as I'm always interested in finding new artists, especially smaller and local ones.

    --
    Sadly, PS/2 was yet another victim of USB, which doesn't care what you plug into it, the electrical slut.
  10. Mathematics != human preference by DanielSmedegaardBuus · · Score: 5, Interesting

    It's exactly algorithms like the one used by Pandora that make me agree with the viewpoint that it's not possibly to calculate what "other music" I like based upon the "known music" that I like.

    Anyone with a preference for Electro Pop will likely have been wondering when the hell Pandora would learn the difference between Miss Kittin and Scooter after mindlessly clicking "Dislike" on eurodance tracks when Pandora fails to see the difference between one type of electronic music with a repetitive beat and another.

    The only really worthful algorithm we'll ever manage to produce is one that uses the collective intelligence of all its users.

    Stop being arithmetic supergeeks wanting to put everything inside a box, and start figuring out how to get all these weird unpredictable people to input valuable data into your system.

    Google figured this out more than a decade ago, so why are we still seeing stupid mathematical and "pattern-based" algorithms every year?

    1. Re:Mathematics != human preference by Misch · · Score: 4, Funny

      If your algorithm don't got Mojo Nixon, then your algorithm can use some fixin'.

      --

      --You will rephrase your request for me to go to hell. Goto statements are not acceptable programming constructs
    2. Re:Mathematics != human preference by Red+Flayer · · Score: 4, Insightful

      It's exactly algorithms like the one used by Pandora that make me agree with the viewpoint that it's not possibly to calculate what "other music" I like based upon the "known music" that I like.

      But that's not the point of the algorithm. The point is to generate a playlist of songs that share some characteristics with criteria you have specified via examples (seeds for a station, and up/down votes on songs in the playlist). It's not about your personal likes and dislikes, it;s about songs that are similar.

      My personal experience: Don't use downvotes until the station is somewhat mature. Use upvotes only, so the algorithm can find the common ground basis for the station. Then, after 10-20 hours of playtime, use downvotes to start eliminating unwanted characteristics.

      One last point: Pandora is good for general tastes. As your wants get very specific within a genre, as you point out, it starts to fail. My general advice for you is to not try to use Pandora to create a pseudo-random playlist of only songs you know you like. After tailoring your station, buy the songs you like. Then you can create a playlist in your preferred audio-file management software, and listen to only the songs you like. Revisit Pandora or elsewhere to expand your collection as needed. I think this is the only way you'll be really satisified.

      --
      "Trolls they were, but filled with the evil will of their master: a fell race..." -- J.R.R. Tolkien on Olog-hai
    3. Re:Mathematics != human preference by darthdavid · · Score: 4, Insightful

      Or stop being so picky about your music, broaden your tastes and learn to enjoy things that don't fit into your specific little boxes...

  11. Re:It's time to put it to a vote: by FroBugg · · Score: 5, Interesting

    Setting aside the obvious joke, the "wisdom of crowds" has actually been proven to be useful in certain situations.

    If you ask, say, a single person how many jelly beans are in a jar, he may or may not come close. If you ask several hundred people how many are in a given jar and then average their responses, the result tends to be surprisingly accurate.

    The problem is that this is limited to situations requiring little to no topic-specific knowledge. Asking a large crowd of random people what the GDP of China is will be a waste of time. It's a technique that requires you to be asking the right questions.

  12. Last.fm by Shadyman · · Score: 4, Interesting

    Last.fm's "neighbor" system works similarly, except it looks at what each person listens to. Keep in mind that it takes a fair bit of training to find neighbors who are actually close to your likes, but once you've listened to enough music, it's pretty good at finding things I like but have never heard of. I.E. if I like song A B C and D, and you like song A, B and C, you might like song D.

    The neighbor system groups people with similar musical tastes, and allows each person to tune to his/her "Neighbor Radio", to listen to songs liked by your neighbors.

    (Disclaimer: I have no vested interest in last.fm besides being a paid member. [My Profile])

  13. Re:Wow. by sarahbau · · Score: 4, Interesting

    I've found a lot of songs/bands I had never heard of thanks to Pandora. I started a station based on "Panic Attack" by Dream Theater, and it's interesting to look at "why was this song selected" for new songs. The current song I'm listening to says "we're playing this track because it features a subtle use of paired vocal harmony, varying tempo and time signatures, chromatic harmonic structure and demanding instrumental part writing." I could have said that I like varying tempo and time signatures, and demanding instrumental parts, but it's neat that it can pick up on things like chromatic harmonic structure and paired vocal harmony.