Let's Hear Something Sad
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What is this site, anyway?
Hidden deep within the Spotify API, for every track on the platform, there is a value called "Valence". Here's what Spotify has to say about it:
"A measure from 0.0 to 1.0 describing the musical positiveness conveyed by a track. Tracks with high valence sound more positive (e.g. happy, cheerful, euphoric), while tracks with low valence sound more negative (e.g. sad, depressed, angry)."
The exact way in which valence functions is unknown - and it certainly can harbour unexpected values - but overall it gives a suprisingly fair reflection of most music's mood.