[henearkr]

Precisely, the millenial whoop carries a little bit of bitterness because it is a minor third. It would be totally different with a major interval (then it would sound closer to some excerpt from the electro-pop era). Edit: I just got aware there are also a lot of minor third in most of the "happiest" electro-tunes, so I am off the point. Maybe it is something else then, like how it is accompanied, the drums, etc. For example, I don't feel very happy when I hear a lot of synthesizer "hand claps" and too much pitch vibrato.