How are the popularity charts calculated?
Uvumi.com determines which charts a song will be in based on the genre tags associated with it. The more people who tag a song as, say, “Rock”, the greater chance that song has to be on the Rock chart. Once a song has enough tags that it clearly falls into one, two, or three distinct genres, the play data is analyzed to determine which songs in that genre are the most popular for the time period that the chart covers. So if a song is tagged as “Rock” and it gets a lot of plays in a day, it has a good chance of moving up on the daily Rock chart. Weekly charts are calculated based on play data spanning the entire week, and monthly charts follow suit as you would expect.
