We reported on 
difficult-to-understand dialogs in recent films a long time ago - the spoken word on the film soundtrack is often noticeably lost in overly loud background or effect noises, and occasionally there is mumbling. Mixing can also be a problem, especially when a movie is played in a home theater.
Dialogue Boost
On Amazon Prime, some of the self-produced movies will now offer a "Dialogue Boost" function, but initially only in the US. For this, AI algorithms search for those places in a movie where dialog might be difficult to understand, whereupon the voice patterns are isolated and temporarily amplified. When the movie is played, the user can select whether and how the voice amplification should be applied (medium or high) by activating a corresponding audio track.
Similar functions were previously offered by some smart TVs or high-end home theater systems - so now movies can bring their own "alternative mix" via AI. However, the actual target group for Dialogue Boost is viewers with limited hearing. Amazon Originals with this feature include "Tom Clancy's Jack Ryan," "The Marvelous Mrs. Maisel," "The Big Sick" and "Being the Ricardos.
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