Most of these comments have to do with pitch and vocal quality and production tricks but as a professional musician I want to note that we have to take into account the actual music/writing/arrangement/language. Kpop uses more musically dense writing (more chords, more elaborate progressions, more sonic candy in general) whole Western pop is usually pretty minimal. The lyrics of a song play a huge roll in it sounding pleasant as well – some consonant/vowel sounds just sound better than others. The producer Max Martin who’s worked with every major pop act since he broke Britney’s career calls this ‘Melodic Math’ – the amount of syllables and sound of the words being more important than the lyrical content. People relate to music for loads of different reasons, it sounds like you relate to Kpop specifically for its sonic qualities.
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