One element of Todd Phillips’ Joker movie that has been celebrated, but still is underrated, is the score by Hildur Guðnadóttir. It’s menacing and moody, but also sparse, by design. It’s meant to make you feel uncomfortable as Arthur Fleck figures out his place in a difficult, disturbing society. But the composer just revealed an incredible technique that she performed in the composition to imply that Joker was slowly overwhelming Arthur, musically.
Article source: https://www.cinemablend.com/news/2486084/theres-a-clever-way-jokers-score-shows-arthur-being-overwhelmed-by-his-evil-persona