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CD Projekt RED to use AI to match Jacek Rozenek's voice in Witcher 3 expansion
The studio has confirmed that Jacek Rozenek will record Geralt's new lines for the "Songs of the Past" expansion, with speech-to-speech technology bringing his voice closer to its sound in the 2015 game. The actor agreed to the approach.
CD Projekt RED has confirmed it will use artificial intelligence in the "The Witcher 3: Songs of the Past" expansion so that the Polish voice of Geralt sounds the way it did more than a decade ago. Jacek Rozenek will record the new lines himself, and the AI will only adjust the timbre of his voice to match the base game.
The information comes from an interview the studio gave to Game File, which Polish media reported on 12 November 2026. Reports from Interia and Chip.pl indicate that this is not text-to-speech synthesis but processing of a voice recorded by the actor.
How it is meant to work
According to Chip.pl, the technique is speech conversion, not text-to-speech. The actor records the lines himself, and the model changes the timbre so that it is closer to the voice from the original game. Chip.pl says this gives a chance to preserve the actor's interpretation and emotion, though it does not guarantee perfect results. Interia stresses that Rozenek's voice will not be replaced by artificial intelligence.
Respeecher received archival dialogue from The Witcher 3 and used it to build a model of the actor's earlier voice. Company representative Dmytro Vasylets said the preparation took dozens of hours. The hardest parts are screams, groans, laughter and subtle shifts in emotion, where the algorithms can still leave distortions.
Why the voice changed
More than ten years have passed since The Witcher 3 launched. Rozenek had a stroke in 2019 and for several months barely spoke, regaining his speech in 2021. His voice is now lower and rougher, which the studio noticed when it invited the actor in for test recordings.
We invited Jacek to our studio to see how his voice sounds now. - Mikołaj Szwed, localization producer at CD Projekt RED (via Interia)
According to Chip.pl, the difference from the roughly 10,000 lines recorded for the base game would be audible. Rozenek had already returned to the studio for the 2022 next-gen update, which he described as a very tiring experience.
Consent and limits
The actor agreed to the use of AI in this project. Interia writes that he expressed trust in the game's creators and in the technology. The studio calls the case exceptional: according to Chip.pl, it does not plan to automatically fix Rozenek's voice this way in future stories set later in the timeline, nor to apply similar processing to Doug Cockle, the English-language Geralt.
Respeecher has already worked with CD Projekt RED on Cyberpunk 2077. In the "Phantom Liberty" expansion, the voice of Viktor Vektor was recreated after the death of Miłogost Reczek, with the lines performed by Janusz Zadura and the family's consent.
The Chip.pl author points to the open question of who controls the voice model once the project ends, and recalls the 2025 SAG-AFTRA agreement on digital replicas. The sources do not say on what terms the model will be stored or used going forward, so that question remains unanswered.
