Apple TV 4K workaround brings Blu-ray Atmos audio to tvOS

A third-generation Apple TV 4K can play a version of Blu-ray Dolby Atmos sound through a community-built workaround. The catch is that the audio doesn’t reach your speakers as Dolby TrueHD: the project transforms the soundtrack and its spatial data into Apple’s own format for playback in tvOS.

That distinction matters if you’re setting expectations. TrueHD is lossless, while Apple’s Positional Audio Codec (APAC) isn’t. The project therefore doesn’t preserve the original soundtrack bit for bit. Instead, it aims to carry the Atmos placement information into a format the Apple TV can play, with results that its creator and some other listeners describe as impressive.

From a Blu-ray soundtrack to APAC

The conversion follows this path: TrueHD Atmos is decoded into audio and timed object metadata, the sound is rendered for a fixed 9.1.6 speaker layout, and the result is encoded as APAC for native tvOS playback. In practice, that means the Apple TV isn’t decoding a TrueHD stream directly. The project does the conversion work first, then hands the device audio in a format it can handle.

Dolby Digital Plus is the Apple TV’s supported Dolby format, and it’s commonly used by streaming services because it requires less data than TrueHD. Blu-ray discs can use TrueHD because they aren’t subject to the same streaming bandwidth limits. For people who store disc-quality movie files and want to play them on Apple TV, that format gap has been a real limitation.

Here’s the trade-off: converting a soundtrack to APAC means giving up TrueHD’s lossless status, but the separate handling of the Atmos metadata is intended to keep the spatial presentation. Reddit user Agathorpt, who put the method together, says the spatial audio works very well on their system. Other Reddit users who have tried it have also reported positive results. Those reports are encouraging, though they aren’t a substitute for listening on your own speakers and room setup.

An open alternative with a hands-on setup

Agathorpt describes the project as an open source alternative to Native Player, a closed source app that can also play TrueHD Atmos on Apple TV. Their stated reason is practical: when audio handling is locked inside one app, other developers can’t readily inspect, adapt or improve that code. An open implementation could give other players a way to build on the same approach.

For now, getting it running takes some technical work. You’ll need a Mac, Apple’s Xcode development software and an Apple developer account to sign the app. The Apple TV 4K must run tvOS 26 or later, and the movie files need 48kHz TrueHD Atmos audio. Agathorpt has shared the steps used to build the project, but this isn’t yet a simple install for anyone who just wants to open a movie file and press play.

The project also draws on existing work rather than claiming a new media engine or decoder. Agathorpt points to Superuser404notfound’s AetherEngine media engine and LibTrueHD object audio decoder as key parts of the process. That foundation helps explain how a community project can bring a more involved audio conversion to a streaming box without adding native TrueHD decoding to tvOS itself.

What Apple TV owners should watch

The approach has been proposed as an addition to the Nuvio media player, which could make it easier for more Apple TV owners to try. Until that happens, building it yourself remains the route. If Xcode and app signing aren’t familiar territory, waiting for a player to include the feature may be the more practical choice.

The source also expects the method to work with the Apple TV 4K (2026), though that compatibility hasn’t been established in the material provided. The new model’s higher price and lack of major new AV features have drawn criticism from some fans, so this software work may matter more to home theater enthusiasts than a hardware upgrade alone.

For Apple TV owners with TrueHD Atmos files, the meaningful development is a way to hear their spatial mixes without waiting for native TrueHD playback. APAC conversion involves a quality compromise, and the build process is still a barrier. The next useful step is a player integration that makes the method easier to install and use.