A film's own account of an AI voice tool drew a narrow line

The process wall

Adrien Brody and Felicity Jones perform substantial passages of Hungarian dialogue in The Brutalist, and the production's post-production wall was a specific pronunciation problem: an English-speaking cast delivering a language whose sounds do not map cleanly onto Anglo-Saxon vowels. Editor Dávid Jancsó, a native Hungarian speaker, said as much directly, explaining that 'certain sounds can be particularly hard to grasp' for actors coming from outside the language, which is the craft problem the film's sound team then addressed in post.

What the documents show

Director Brady Corbet's statement, given after Jancsó's remarks drew attention, is precise about scope: 'Innovative Respeecher technology was used in Hungarian language dialogue editing only, specifically to refine certain vowels and letters for accuracy. No English language was changed.' He described the work as manual rather than automated, 'done by our sound team and Respeecher in post-production,' and said the aim was 'to preserve the authenticity of Adrien and Felicity's performances in another language, not to replace or alter them.' Corbet also addressed a separate claim circulating about the film's architecture, stating that production designer Judy Becker's team 'did not use AI to create or render any of the buildings' and that 'all images were hand-drawn by artists,' as reporting on the statement and an account of Jancsó's explanation both record.

Authorship and limitation

The mechanism described is phonetic correction of already-recorded performance audio, not text-to-speech generation: a tool adjusting specific vowels and letters within lines the actors actually spoke, which is why Corbet frames the performances as 'completely their own.' That is a different process from generating new speech from a script, and the distinction is doing real work in the statement, though neither source describes exactly how the tool isolates and replaces a vowel without affecting surrounding performance. Corbet also credits months of work with dialect coach Tanera Marshall, meaning the disputed tool sat on top of a human coaching process rather than replacing it.

What survives

What survives is a distinction a viewer can hold onto: a tool that corrects pronunciation inside a captured performance is not the same claim as a tool that writes or performs dialogue. Editorially, the disclosure here came only after Jancsó's own remarks prompted questions, not as information volunteered with the film's release, which is why the story became about disclosure as much as about the technique itself.

• Separate the dialogue-editing claim from the architecture claim; the two were reported together but Corbet's statement addresses them very differently.
• Check whether a similar production credits a dialect coach alongside any voice-processing tool, since both were present here.
• Note the timing: the explanation followed press questions rather than accompanying the film's original release materials.

Neither statement is independently verified against the finished audio, so what is established here is the filmmakers' own account of scope and intent, not a technical audit of the result.