The scariest movie you’ll ever hear? How Undertone became an aural nightmare

Filipino-Canadian director Ian Tuason's horror film Undertone, debuting Thursday, utilizes sound as its primary fear factor. Tuason, who experienced unsettling occurrences during filming, noted that the immersive audio is central to the film's chilling experience. He emphasized that sound accounts for 70 to 80 percent of horror's impact, inviting viewers into a uniquely terrifying auditory nightmare.

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Summary by Glance · Original reporting by SMH