Bernard Herrmann addresses the unconscious regions, summon atmosphere and dread. He is jogging the memory of those who know Tristan and the subconscious of those who don't. His veiled citations indicate in their own way the unstoppable recurrence of the past.
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https://www.youtube.com/watch?v=7C_dNF86ti8
https://www.youtube.com/watch?v=gjEbHBafvm0
https://www.filmsnest.com/article/review-of-the-movie-the-equalizer