Dolby Digital Plus Decoder for PC OEMs 1.2.591.0

If a film plays with a picture but no sound on Windows, and the audio track is listed as EAC3, Dolby Digital Plus or E-AC-3, this is the missing piece.

It is the decoder Dolby licenses to PC manufacturers, and it teaches Windows itself how to unpack a Dolby Digital Plus soundtrack into as many as 7.1 channels.

It is free, it is about 33MB, and there is a fair chance your PC already has it.

What This Actually Fixes

Dolby Digital Plus is the surround format Netflix, Disney+, Amazon Prime Video and most broadcast streams use, and it turns up in MKV and MP4 files ripped from those sources. Windows cannot always decode it on its own.

This package plugs the gap at the operating system level rather than inside one program. Once it is installed, anything that leans on Windows for audio decoding gains EAC3 playback.

In practice that means the built-in apps: Windows Media Player, Media Player, Films and TV, Photos, and the streaming apps you install from the Microsoft Store.

Check Whether You Already Have It

Most PCs sold with Windows 10 or 11 shipped with this preinstalled, because the manufacturer licensed it. Installing a second copy is harmless but pointless, so it is worth thirty seconds to look.

1. Open Settings, go to Apps, then Installed apps.
2. Search for Dolby and see whether "Dolby Digital Plus Decoder for PC OEMs" is listed.
3. If you would rather be certain, open PowerShell and run Get-AppxPackage *DolbyDigitalPlus* - a result means it is installed, no result means it is not.

If it is already there and your audio still fails, the decoder is not your problem. Skip to the section on what else could be wrong.

What You Are Downloading

The file is an .appxbundle, not a conventional setup program. That surprises people who expect an EXE and assume the download broke.

On Windows 10 and 11 you double-click it and App Installer takes over, the same way a Microsoft Store package installs. There is no options screen and nothing to configure afterwards.

Restart any player that was already open before you test it, because programs read the available decoders when they start.

Who Should Look Elsewhere

The tell is which player you use. If your Dolby audio problem is in a third-party player rather than a Windows app, this package will not touch it.

MPC-HC and VLC both decode EAC3 internally and have done for years. If either of them is silent on a Dolby track, the cause is elsewhere - usually an output device set to stereo, or passthrough sending a bitstream your receiver cannot read.

For those players, LAV Filters is the tool that matters. It decodes essentially every audio and video format and handles bitstreaming to an AV receiver properly.

• You want one package that covers everything. The K-Lite Codec Pack bundles LAV Filters, MPC-HC and the rest, and is the easier answer for most people.
• You need AC3, DTS and EAC3 in one small filter. The DTS/AC3/DD+ Source Filter does exactly that and nothing else.
• You are on an older machine with legacy AC3 files. AC3 Filter still works, though our comparison of AC3 Filter and LAV Audio explains why it is no longer the default choice.
• Your content uses Dolby Atmos over AC-4. That is a different format needing the Dolby AC-4 Decoder.
• Your sound is wrong rather than absent. Start with your audio drivers - Realtek HD Audio Codecs covers most desktop and laptop motherboards.

The wider shelf is on the audio codecs and codec packs pages.

The Windows 11 24H2 Change

This page gets busier since Microsoft removed the built-in Dolby Digital codec from Windows 11 24H2, and the reason is straightforward.

A machine upgraded from an earlier build usually keeps the old codec and carries on working. A clean 24H2 install does not have it, which is why the same laptop can lose Dolby audio after a reset and nothing else appears to have changed.

If that describes your situation, this package is the direct replacement for what went missing.

Finding Out What Your File Actually Contains

Guessing at codecs wastes time. Before installing anything, it is worth confirming which audio track the file really carries.

MediaInfo reads a file and lists every stream inside it, including the exact audio format and channel count. Our codec finder does the same job in the browser if you would rather not install anything.

More tools of that kind are grouped under codec identifiers.

Quick questions

Download the Dolby Digital Plus Decoder for PC OEMs and see whether it brings your sound back, or tell us how you got on if you have used it before.