A24’s ‘Undertone’ Hailed as the ‘Blair Witch’ of Auditory Horror at Sundance

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The Sundance Film Festival has officially begun, bringing with it a wave of excitement surrounding A24’s latest horror offering, "Undertone." Early reactions from the premiere have been nothing short of ecstatic, with many critics already labeling the film a modern masterpiece of psychological tension.

Directed by a newcomer whose identity remains shrouded in mystery, the film relies almost entirely on an immersive soundscape to convey its terrifying narrative. This bold stylistic choice has led industry insiders to compare it favorably to "The Blair Witch Project," citing its ability to generate fear through suggestion rather than explicit visual gore.

Reviews pouring in from Park City describe the experience as "chilling" and a refreshing departure from the jump-scare-heavy tropes that have dominated the genre in recent years. Audiences are reportedly leaving the theater in a state of deep unease, proving that the most effective horror often resides in what is heard rather than what is seen.

The story follows a sound engineer who begins to decipher a frequency that induces hallucinations, blurring the lines between reality and auditory fabrication. As the protagonist descends further into madness, the film’s sound design manipulates the theater's acoustics to make viewers feel as though they are physically trapped inside the character's unraveling mind.

While "Undertone" dominated the horror conversation, the festival also delivered star power with a surprise appearance by Julia Roberts and Allison Janney. The duo shocked attendees by introducing a secret screening of their new drama "Miss You, Love You," adding a layer of Hollywood glamour to the independent film circuit's opening weekend.

The market for distribution remains just as heated as the critical buzz, with Neon making a significant move early in the festival. The distributor preemptively acquired global rights for "4 X 4: The Event," marking the highly anticipated second horror feature from rising director Alex Ullom.

Despite these high-profile acquisitions and celebrity sightings, the lingering impact of "Undertone" suggests it will be the defining talking point of this year's festival. A24 appears to have struck gold once again, proving that innovation in the horror genre is alive and well when filmmakers dare to strip away the visuals and attack the senses directly.

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Published: Jan 25, 2026. Last updated: Jan 26, 2026.

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