How to turn on Amazon Prime's free Dialogue Boost option for movies and shows

Amazon Prime's Dialogue Boost option shown on a TV, in a living room
(Image credit: Amazon)

It's always annoying to miss a central character's dying confession because a bomb went off behind them, and Amazon gets that.

As far as Jeff Bezos' behemoth is concerned, streaming the best Prime Video series doesn't have to mean splurging on the best Dolby Atmos soundbars or even Faller's new dedicated voice-enhancing speaker

In April, Amazon Prime rolled out a neat new piece of software that lets you self-select a dialogue volume level to suit you or your family's needs. And it works on any device with Prime Video, on select movies and TV shows worldwide. 

It's called Dialogue Boost and, since it only targets speech (rather than bringing that thunderous soundtrack along with it), it should be much more effective than simply turning up the volume of your TV.

Here’s everything you should know about Amazon Prime Video’s Dialogue Boost, including how to find it, how to turn it on and how it works.

What is Dialogue Boost on Amazon Prime?

Best Amazon UAE shows

Harlem's main cast of four, 30-something women electrifyingly funny, and with Dialogue Boost you should be able to hear every word.  (Image credit: Amazon)

Dialogue Boost is Amazon’s answer to augmenting voices in Prime Video movies and shows. The tech uses artificial intelligence to seek out and solve on-screen moments where dialogue may be harder to hear above whatever's happening in the background. 

Take note, it's not available in all of the best new Prime Video movies and shows – not yet, anyway. Right now, you can check to see if a specific title is available with Dialogue Boost under the ‘Audio Languages’ header in the ‘Details’ section of your chosen title on Prime Video. If Dialogue Boost is supported, it will be listed alongside other language soundtracks.

Amazon is keeping it simple by telling customers three Amazon Originals series now available with Dialogue Boost (Tom Clancy’s Jack Ryan, The Marvelous Mrs. Maisel and Harlem) and three movies: The Big SickBeautiful Boy and Being the Ricardos. The feature will, says Amazon, become available on additional titles this year.

“This AI-based approach delivers a targeted enhancement to portions of spoken dialogue, instead of a general amplification at the center channel in a home theater system,” Amazon confirms. “As a result, Dialogue Boost can be enjoyed anywhere the Prime Video experience is available.”

How to turn on and use Dialogue Boost on Amazon Prime

Rachel Brosnahan stars in The Marvelous Mrs Maisel on Prime Video

Hear just how funny Midge is at the comedy club: The Marvelous Mrs. Maisel is one of the offerings available with Dialogue Boost on Amazon Prime Video  (Image credit: Amazon)

Start by turning on subtitles and audio descriptions on Amazon Prime Video. It's simple to find; on your chosen title's overview screen, press up then right in order to select Subtitles.

Now, when your movie or TV show starts playing, select Subtitles, then the Audio icon to view and choose which level of Dialogue Boost you want to use. You'll see a drop-down menu with 'English Dialogue Boost: Medium' and 'English Dialogue Boost: High' options. 

As you'd expect, each level of intensity promises different vocal amplification, so test them out to find the one that works best for you and your device, TV or bigger home theater system. The tumultuous action in Jack Ryan will probably require more of a vocal boost than The Marvelous Mrs. Maisel, right? The key thing is to experiment with it – one profile doesn't have to cover all bases. 

Considering the National Institute of Health claims about one-third of older adults have hearing loss, Amazon has done a decent thing here by offering its content with free, easy-to-hear profiles. 

Frankly, if you're trying to choose between Netflix, Disney Plus or Prime Video this month, this innovative and helpful new feature might just have swung it in Amazon's favor. Fancy giving it a go? See the best Amazon Prime Video deals and free trials below. 

Becky Scarrott
Senior Audio Staff Writer

Becky is a senior staff writer at TechRadar (which she has been assured refers to expertise rather than age) focusing on all things audio. Before joining the team, she spent three years at What Hi-Fi? testing and reviewing everything from wallet-friendly wireless earbuds to huge high-end sound systems. Prior to gaining her MA in Journalism in 2018, Becky freelanced as an arts critic alongside a 22-year career as a professional dancer and aerialist – any love of dance starts with a love of music. Becky has previously contributed to Stuff, FourFourTwo and The Stage. When not writing, she can still be found throwing shapes in a dance studio, these days with varying degrees of success.