Oppenheimer director Christopher Nolan has revealed the reason why audiences often have trouble hearing his movies.

Director Christopher Nolan has become known for making hugely successful, critically acclaimed, crowd-pleasing blockbusters.

But there has been one major criticism that has followed the filmmaker for a while now: sometime his movies are quite hard to hear.

Leveled at the likes of The Dark Knight Rises and Tenet, Nolan’s recent biographical drama Oppenheimer has also faced this issue, and the director has now explained why.

Speaking with Insider, Nolan has revealed that he does not like to use ADR (additional dialogue recordings) in post-production.

"I like to use the performance that was given in the moment rather than the actor revoice it later. Which is an artistic choice that some people disagree with, and that's their right."

ADR is a standard tool used by filmmakers in post, allowing them to make dialogue clearer after the fact.

However, Nolan is not a fan, instead preferring to take the performance in the moment and use it regardless of how muffled or overwhelmed the dialogue may become

Nolan continued, revealing that his love for IMAX cameras can sometime have an impact on how clear the dialogue is.

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