...Or is it?

Music:
Music: https://posy.bandcamp.com/
Spotify: https://open.spotify.com/artist/3zkrm...
Apple Music:   / posy  

1st synthesizer: Sytrus (in FL Studio)
2nd synthesizer: Harmor (in FL Studio)

Thanks to DaoWaves for the tutorial on sine wave speech using 'Spraak' :
   • Sine Wave Speech in PRAAT  

Speaker in the video (and thumbnail): Tannoy Sensys DC1. Used a long time for reference, not anymore.

Most visualizations were also done with FL Studio's 'Wave Candy' (screen capture).