Undertone 4K 2025 Ultra HD 2160p

The podcast host is caring for her dying mother. One day, she receives recordings featuring a married couple who have encountered a paranormal phenomenon. With every sound, the protagonist is pushed closer and closer to madness.

User Review

“The scariest movie you’ve ever heard.” What a claim! It’s hard not to think that the PR is biting off more than it can chew. Still, you really want to believe in the incredible sensations to come—a “new auditory language of horror,” where fear isn’t born on the screen but in the space around the viewer. In other words, an immersive auditory nightmare.

Well, let’s be completely honest: the film doesn’t deliver on its promised technical breakthrough. At the same time, however, it successfully achieves a more modest goal: creating a cohesive atmosphere where sound becomes the primary conduit into a world of dread. Still, the emphasis on audio here isn’t just a necessary low-budget workaround, but a deliberate artistic choice. It’s as if the target audience is meant to focus on the psychology and details that are often lost amid the abundance of visual effects in large-scale productions. But not everything turned out as intended, as will be discussed further below.

At the center of the story is a young woman named Ivy, forced to spend every day with her terminally ill mother, who is in a comatose state. Her only escape is a podcast about paranormal phenomena, which Ivi hosts alongside an old friend living in London. When their amateur production team receives 10 mysterious audio recordings from an unknown sender, their familiar routine begins to unravel.

The sound design of *Undertone* itself is executed with a noticeable focus on the narrative. All sorts of creaks, distorted voices, and other unnerving sounds are woven into the story in such a way that they gradually strip the main character—and, along with her, the audience—of any sense of security. Yes, there are no revolutionary acoustic solutions here that could claim a place in the history of the genre, but the sound designer’s work demonstrates a high level of craftsmanship. The climax and final scenes bring the soundscape to its maximum intensity. And although the effect remains within the bounds of genre expectations, it organically supports Ivy’s emotional state. For the seasoned horror fan, this is hardly a revelation, but as a tool for immersion, the sound in *Undertone* works reliably.

The film’s pace follows in the tradition of the slow-burner, where tension is built not through sudden jump scares, but through a growing sense of foreboding that something terrible is coming.
For the most part, “Undertone” resembles an intimate psychological drama in which horror seeps in stealthily. Director Ian Tuason takes his time with the shock moments, preferring instead to explore how the familiar world slowly loses its stability under the weight of invisible pressure.

Beneath the horror façade lie several layers of meaning: the heavy burden of caring for a dying mother, a sudden pregnancy, the struggle with a resurgent addiction, and the gradual erosion of a rational worldview.
Each of these storylines adds depth to Ivy’s character and makes her reaction to the paranormal audio files psychologically plausible. And although the climax clearly prioritizes the supernatural threat, and the dramatic themes remain unresolved, they serve as an important emotional backdrop.
But some viewers may be disappointed that the narrative meaning, as such, has gone nowhere.

Therefore, by and large, “Undertone” can be praised for its unique aesthetic, and at the same time criticized for its storytelling.
Yes, director Ian Tuason is competent. In the sense that the visual style, stripped of excess, serves as a solid foundation for sound experiments, and the editing carefully maintains the rhythm, preventing the action from becoming bogged down in stagnation.
The unsettling vibe is also effectively conveyed. But the coherent story ultimately gets thrown away, no matter how profound and tragic it may have seemed at the beginning.

Is “Undertone” worth seeing in theaters? Yes. Just as it’s worth watching at home, preferably with a powerful sound system. Should you expect catharsis? No. But be that as it may, the director has already been tapped to direct the next “Paranormal Activity.” And as we all know, this franchise has legions of fans. And if you’re one of them, then “Undertone”—thanks to a number of key similarities—is the movie for you.

Info Video

Codec: HEVC / H.265 (78.9 Mb/s)
Resolution: 4K (2160p)
HDR: HDR10+
Original aspect ratio: 2.20:1

Info Audio

#English: Dolby TrueHD with Dolby Atmos 7.1
#English: Dolby Digital 5.1
#French: Dolby TrueHD 5.1

Info Subtitles

English SDH (PGS), Arabic, Bulgarian, Chinese (Simplified), Chinese (Traditional), Czech, Danish, Dutch, Estonian, Filipino, Finnish, French (Canadian) SDH (PGS), French (Metropolitan), German, Greek, Hebrew, Hindi, Hungarian, Icelandic, Indonesian, Italian, Korean, Latvian, Lithuanian, Malay, Romanian, Russian, Norwegian, Polish, Portuguese (Brazilian), Portuguese (European), Slovak, Slovenian, Spanish (Castilian), Spanish (Latin American), Spanish (Latin American) SDH, Swedish, Tamil, Telugu, Thai, Turkish, Ukrainian, Vietnamese.