In the previous blog post, we saw how Linkin Park's musical style changed over the years, by looking at the mean and variation of audio features of their songs. In particular, we looked at 4 audio features - duration, energy, loudness, and valence. In this post, we'll try to encapsulate 2 of those features (energy and valence) into a new label, known as the "mood" of a song, and see how the general mood of their albums changed with the albums. You don't need to read the previous post to understand this one. Again, if you're not a programmer, don't worry, you can gain value from this post by ignoring the code and focussing on the insights.

The code for this post is available at this github repository.

Before we start the analysis, though, let me try to articulate what I mean when I say "mood" of a song.