The Brutalist 'perfected' its Hungarian dialogue with Respeecher AI. The 70mm purists are not pleased.

The marketing for Brady Corbet’s The Brutalist was an orchestrated campaign of analog fetishism. Critics and cinephiles were fed a steady diet of technical specs that read like a manifesto for "pure cinema": a 215-minute runtime, a built-in fifteen-minute intermission, and a sprawling narrative captured on 70mm VistaVision. It was positioned as the antithesis of the modern digital assembly line—a heavy, tactile object of art that demanded respect for its physical presence and unfiltered human struggle.

The integration of Respeecher AI in The Brutalist represents a documented instance where a major awards contender utilized neural synthesis to replace a significant portion of its lead actors' vocal performance, effectively logging a departure from traditional ADR into a territory of "computational performance" that invalidates the production's analog marketing claims. While the filmmakers maintain that the technology was merely a surgical tool for clarity, the incident has registered a shift in how we define the integrity of an acting performance. By smoothing over the phonetic failures of its leads, the production signaled that even in a film dedicated to the reality of the human condition, the "human" part is sometimes considered a bug to be patched in post-production.

The RedShark Leak: When 'Pure Cinema' Met the Neural Network

The "analog purity" narrative began to unravel on January 20, 2025, following a candid interview with the film's editor, Dávid Jancsó. Speaking to RedShark News, Jancsó detailed the process of bringing Corbet’s vision to life, but his admission regarding the audio sent ripples through the industry. Jancsó revealed that the production had utilized Respeecher—a Ukrainian startup specializing in Voice Conversion—to refine the Hungarian dialogue of Adrien Brody and Felicity Jones.

The "Part of Me" quote became the lightning rod for the ensuing controversy. Jancsó admitted that "most of their Hungarian dialogue has a part of me talking in there," explaining that his own native Hungarian delivery served as the "source" for the AI to reshape the actors' phonemes. For a film that had spent months building a reputation on the blood and sweat of its 70mm production, the idea that the lead actor's voice was a collaborative data output with his editor was a difficult pill for the purist camp. This admission, further detailed in Variety, suggested that the vocal performance was not a singular human act but a hybrid synthesis.

The social media fallout was immediate and clinical. On X, users expressed a sentiment that resonated across film forums: "Genuinely crushed by the AI scandal surrounding the brutalist. doesn’t using AI completely undo any ‘authenticity’ that you set out to accomplish right away?" The critique wasn't just about the use of technology; it was about the perceived betrayal of the film's analog brand. If the goal was to capture the struggle of a Hungarian immigrant, the critics argued, then the struggle of the actor to master the language was a vital part of that performance. By replacing that struggle with a "perfected" phonetic average, the production had arguably replaced art with engineering.

A Chronology of a 'Microscopic' Crisis

The 48-hour period following the RedShark interview was characterized by an attempt at damage control by A24 and director Brady Corbet. On January 21, 2025, NBC News published an investigation into the controversy, forcing the production to clarify exactly how much of the performance was human and how much was neural. This report provided the first large-scale exposure of the "AI scandal" just as the awards circuit reached its peak intensity.

The timeline of the crisis highlights the strategic re-framing of the narrative:

Date	Event	Action/Outcome
Jan 20, 2025	RedShark Interview	Dávid Jancsó reveals the use of Respeecher AI for "perfecting" dialogue.
Jan 20, 2025	Social Media Surge	Immediate backlash from cinephile community regarding performance integrity.
Jan 21, 2025	NBC News Report	Wide-scale reporting on the use of AI just before Oscar nominations.
Jan 21, 2025	Official Statement	Brady Corbet defends the tool as a version of ADR.
Jan 29, 2025	Today.com Report	Adrien Brody's performance is discussed, asking for faith in the process.

In his defense, Corbet insisted that the technology was used exclusively for Hungarian-language dialogue to fix specific vowels and consonants that are phonetically difficult for non-native speakers. According to a statement provided to Deadline, the director characterized the process as "Innovative Respeecher technology... used in Hungarian language dialogue editing only." The aim, he claimed, was to preserve the authenticity of the performances in another language, not to replace or alter them. Corbet's previous work, such as Vox Lux, as noted by The Hollywood Reporter, has often explored the intersection of technology and performance, though never in a way that felt this deceptive to his audience.

This defense relied on a very specific definition of performance. Corbet argued that the "soul" of the acting—the timing, the emotion, the facial expressions—remained entirely the actors'. The AI was merely a high-precision filter for the sound waves. However, the analog purist rebuttal was that the physical resonance of a human voice is inseparable from the performance. By swapping the frequency of Adrien Brody's vocal cords for a synthetic hybrid, the production had created a computational performance that exists in a gray area between acting and animation.

The Respeecher Method: Speech-to-Speech vs. Acting

To understand why this caused more of a stir than standard ADR, one must look at the mechanics of Speech-to-Speech conversion. Traditional ADR involves an actor returning to a studio to re-record lines that were muffled on set. The actor is still the source of both the performance and the sound. Respeecher’s method, as documented on the Respeecher Blog, is technically different. It takes the "target" voice (Brody) and uses a "source" voice (Jancsó) to guide the delivery.

The AI then synthesizes a new audio file that has Jancsó’s native Hungarian inflection but Brody’s vocal timbre. This process, known as Phonetic Refinement, goes beyond fixing volume; it alters the physical mechanics of how a word is spoken. According to Respeecher's own Technical Overview, the system maps the "latent space" of human speech to ensure that the output retains the target's identity while adopting the source's prosody. This is not "cleanup"; it is a transplant of vocal intent.

The irony of the situation is that Brody and Jones reportedly spent months working with dialect coach Tanera Marshall, according to an interview in USA Today. Marshall, whose work is documented on her official portfolio, is known for rigorous linguistic immersion. They did the homework, learning the mouth shapes and the rhythms of the Hungarian language. But the production decided that "good enough for an American" wasn't good enough for a 70mm masterpiece.

This creates a documented conflict with the labor of dialect coaching. If an algorithm can fix a bad accent in post, the incentive for actors to spend months in linguistic immersion diminishes. More importantly, it removes the humanity found in the imperfection. If the character of László Tóth is a man out of place, struggling to build a new life in a foreign tongue, his Hungarian should reflect his own physical history. The AI-assisted dialogue suggests that the filmmakers valued a statistical average of native Hungarian over the specific, flawed reality of their lead actor's performance.

The Awards Season Panic: Can a Statistical Average Win an Oscar?

The timing of the leak was particularly problematic, occurring just days before the 2025 Academy Award nominations. The Brutalist was the presumptive frontrunner in multiple categories, including Best Actor for Adrien Brody. The revelation triggered a debate within the Academy regarding the definition of a human performance. Academy rules, specifically the 97th Oscars Rulebook, state that the actor must be the primary creator of the performance, but they remain vague on digital augmentation.

Critics argued for disqualification, or at least a mandatory "AI Disclosure." The precedent often cited was the 2024 film Emilia Pérez, which used Respeecher to blend Karla Sofía Gascón’s voice with singer Camille. However, as Gascón noted in a Variety interview, Emilia Pérez was a musical where the blending was an overt stylistic choice. The Brutalist was marketed as a gritty drama. The comparison only served to highlight the lack of transparency in Corbet's production.

Adrien Brody’s response in USA Today attempted to shift the focus back to the craft: "I understand that we live in a time where even just the mention of AI is a bit triggering. I just wish people had more faith in the creative process." While Brody received his nomination, the controversy altered the discourse. It forced voters to ask a question they weren't prepared for: If an actor's performance is perfected by a machine, who is the author of that performance?

The Academy's rules on AI remain reactive rather than proactive. While they have banned fully AI-generated actors from eligibility, they have yet to draw a clear line on augmentation. The Brutalist incident has become the test case for this new reality. It suggests that the future of acting categories may require a forensic audit of the audio files to ensure that the best actor is actually the one speaking.

Counter-Argument: A Surgical Tool for Linguistic Accuracy

It is only fair to present the filmmakers' position as they intended it. Director Brady Corbet and the team at Respeecher argue that the technology was merely a high-precision version of ADR, used only to fix vowel sounds that were phonetically impossible for native English speakers. According to the Respeecher Blog, the process was conducted with the enthusiastic consent of the actors and was designed to protect their work from sounding unconvincing to native Hungarian speakers.

This perspective views AI as a utility—a more efficient way to achieve what filmmakers have been doing for a century with ADR and creative editing. They argue that if you use a digital brush to remove a wire from a stunt scene, you haven't invalidated the stunt. Therefore, using a digital tool to remove an American vowel shouldn't invalidate the acting. The goal, in their view, was the suspension of disbelief for a specific audience segment.

However, this argument falls short when applied to the specific medium of acting. While phonetically accurate, the process of voice conversion inherently replaces the actor's unique physical resonance with a synthetic or guided frequency. If authenticity is the goal, the struggle of a non-native speaker is part of the human performance that the AI smooths over. A wire in a stunt scene is an external necessity of safety; an accent in a performance is an internal expression of character. By treating the voice as an external asset to be swapped, the production decoupled the actor's physical presence from their emotional delivery.

Lessons from the Brutalist: The New ADR Standard

The fallout from The Brutalist incident provides a receipt of where the industry is heading. We are moving from the 2023 strike rhetoric—where AI was seen as an existential threat that would replace actors entirely—to the 2025 reality, where AI is an invisible utility that augments them until they are unrecognizable as single individuals. The "Authenticity Paradox" is now a documented feature of modern production.

Audiences demand more purity (70mm, analog film, practical effects) while studios use more refinement (AI dialogue, digital de-aging, neural rendering) to ensure that purity is palatable for a global market. We want the feeling of a 1940s epic, but we want the precision of a 2026 algorithm. This contradiction is central to the film's production history and its eventual reception.

The industry now faces a "Transparency Mandate." As seen in the NBC News coverage, the backlash was fueled not just by the technology, but by the reveal. Had the production been upfront about using Respeecher as a dialect tool from the beginning, it might have been framed as a technological advancement. Instead, by letting it slip in a technical interview, they made it look like a hallucination of the film's own marketing.

Conclusion: The Collaborative Data Output

The evidence presented regarding the production of The Brutalist supports the thesis that the film’s reliance on Respeecher AI exposes a widening gap between the industry's analog marketing and its digital reality. While the film remains a cinematic achievement, the use of Voice Conversion to perfect its leads' Hungarian dialogue fundamentally altered the pact of authenticity between the actor and the audience.

The technical success of the AI—the fact that the accents are indeed phonetically perfect—is precisely what creates the failure of art. By removing the microscopic failures of human speech, the production removed the very thing that the 70mm format was designed to capture: the unfiltered truth of the human form. The transition from ADR to computational performance is not a difference of degree, but a difference of kind. It turns the actor's voice from a physical reality into a collaborative data output.

As we move forward, the receipts from this controversy suggest that the 70mm purists were right to be skeptical. Not because technology shouldn't be used in film, but because the industry’s refusal to disclose its digital interventions suggests a lack of faith in the very humanity it claims to be celebrating. The Brutalist will likely be remembered as a masterpiece of 2020s cinema, but it will also be remembered as the moment the neural network finally mastered the human accent—and in doing so, made the human actor feel like a placeholder.