[omn1]

Interesting approach but a lot of songs I would consider falling into this category score very low:

Here are a few examples from the original reddit post[1]:

  Song (Correlation)

  The Velvet Underground - Heroin (2.95)
  The Beatles - A Day In The Life (0.00)

Other songs with low correlation:

  Lynyrd Skynyrd - Free Bird (0.38)
  Metallica - Hero Of The Day (3.72), One(3.47)

I think the reason is that tempo and compression (which I associate with tension) are not taken into account but play a big part in our hearing experience. This data may be harder to extract, though. Anyway interesting work!

[1]: http://www.reddit.com/r/Music/comments/hnc3b/what_is_your_fa...