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Actually, we do clean that data up with our corrections system. We have a large fingerprint database which allows us to work out when a track is the same and w

by dunk010 16y ago

Actually, we do clean that data up with our corrections system. We have a large fingerprint database which allows us to work out when a track is the same and we update the charts across the site to reflect this. We even expose this as a service in the API: http://www.last.fm/api/show?service=446 http://www.last.fm/api/show?service=446 http://www.last.fm/api/show?service=447 http://www.last.fm/api/show?service=447 What you're probably seeing there is tracks which are so new that we've not determined similar fingerprints for them yet, or those changes have not propagated to the charts (we use a lot of caching as you might imagine). In fact, checking the chart now it seems that that particular problem has cleared up. Also, artist disambiguation is a _hard_ problem, but it's something that we'd very much like to address.

davidmathers 16y ago
What you're probably seeing there is tracks which are so new that we've not determined similar fingerprints for them yet I don't think so. Look at Kanye West: http://www.last.fm/music/Kanye+West/+charts?rangetype=week&subtype=tracks http://www.last.fm/music/Kanye+West/+charts?rangetype=week&#... Monster should be in place 3 with 14,757 listeners. Instead it's in places 12, 16, 27, and 61. It was a top 20 track for some number of weeks, but it didn't show up in the top 20. In fact, checking the chart now it seems that that particular problem has cleared up. I'm not sure what you're referring to. I've never seen this problem clear up. Also, artist disambiguation is a _hard_ problem I understand that, and I'm not criticizing that. I'm just pointing out that Pandora is making an effort to work on that hard problem while Last.fm ignores very easy problems. Specifically the easiest problem: albums in which all the track names are wrong because they all have "Explicit" or "Album Version" or some other string appended to their names.
- xiongchiamiov 16y ago
  The real killer for auto-correction is that it seems to require many users to work - artists in the thousands don't seem to ever get corrected. It also doesn't help that Pandora has terrible tagging. I have a number of "Horner, James - Braveheart, Film Score"-esqe scrobbles that originate from them.

by dunk010 16y ago

davidmathers 16y ago

What you're probably seeing there is tracks which are so new that we've not determined similar fingerprints for them yet I don't think so. Look at Kanye West: http://www.last.fm/music/Kanye+West/+charts?rangetype=week&subtype=tracks http://www.last.fm/music/Kanye+West/+charts?rangetype=week&#... Monster should be in place 3 with 14,757 listeners. Instead it's in places 12, 16, 27, and 61. It was a top 20 track for some number of weeks, but it didn't show up in the top 20. In fact, checking the chart now it seems that that particular problem has cleared up. I'm not sure what you're referring to. I've never seen this problem clear up. Also, artist disambiguation is a _hard_ problem I understand that, and I'm not criticizing that. I'm just pointing out that Pandora is making an effort to work on that hard problem while Last.fm ignores very easy problems. Specifically the easiest problem: albums in which all the track names are wrong because they all have "Explicit" or "Album Version" or some other string appended to their names.

xiongchiamiov 16y ago
The real killer for auto-correction is that it seems to require many users to work - artists in the thousands don't seem to ever get corrected. It also doesn't help that Pandora has terrible tagging. I have a number of "Horner, James - Braveheart, Film Score"-esqe scrobbles that originate from them.