AC-3 (Dolby Digital) codec no longer included with Windows 11 version 24H2

Rollback_Jockey · Jun 21, 2024

Can this codec be saved and reinstalled on lacking systems?

antspants · Jun 21, 2024

Rollback_Jockey said:
Can this codec be saved and reinstalled on lacking systems?

I was wondering the same. And when I first read this, briefly went in search of an independent download for it, with no luck.

NormanF · Jun 21, 2024

Dolby is now obsoleted as an audio format. That's why it was removed from Windows 11.

Scott · Jun 22, 2024

Dolby and DTS are alive and well on my computer.

NormanF · Jun 22, 2024

LAV Filters from Github can be installed to restore system wide support for AC-3 and EAC-3 Dolby audio formats.

Diceman2037 · Jun 26, 2024

NormanF said:
LAV Filters from Github can be installed to restore system wide support for AC-3 and EAC-3 Dolby audio formats.

Yeah, no.

LAV does not exist as an MFT, so it does not restore system wide support.

2112 · Nov 10, 2024

uncyler825 said:
Windows 11, version 24H2, the AC-3 codec is no longer included with Windows. Now, you can install Microsoft Dolby Digital Decoder/Encoder MFT support into Windows 11 24H2 Build 26100 via AnWave Windows Key-Point.

1. Download AnWave from AnWave
Or AnWave 2024 | AMD Radeon Software Customize Setup - More Radeon Software Installation Options

2. Extract AnWave_v2.1.3.8_20240531_Stable_Release_LS2_Installer.exe. It is a self-extracting file.
3. Run AnWave.exe. Menu > Tools > Windows Key-Point
4. Click Install AC-3 Decoder MFT / Install AC-3 Encoder MFT button.
5. Finish!

Adobe Premiere Pro uses Microsoft's native AC-3 Codec, and you can use this tool to regain AC-3 encoding/decoding support for Windows 11 24H2.

I just noticed that i could not import mp4 files with 5.1 audio into Premiere Pro, on a fresh install of Win 11 24H2. But when i download AnWave 2024 version 5.42.15.24 there is no option for installing anything AC3 related in the Windows Key Point section.

Was this removed from AnWave?

BrianInEngland · Nov 10, 2024

It's retained if you upgrade to 24H2 from an earlier version so I guess doing a clean install of 23H2 and then an in-place upgrade would be the solution.

DexKen · Nov 10, 2024

2112 said:
I just noticed that i could not import mp4 files with 5.1 audio into Premiere Pro, on a fresh install of Win 11 24H2. But when i download AnWave 2024 version 5.42.15.24 there is no option for installing anything AC3 related in the Windows Key Point section.

Was this removed from AnWave?

It was, it is now a split release
Release AnWave 2024 Split Feature Release · SimonMacer/AnWave

2112 · Nov 10, 2024

DexKen said:
It was, it is now a split release
Release AnWave 2024 Split Feature Release · SimonMacer/AnWave

O.k, thanks! :)

It seems to be in the latest AnWawe as well and has moved from the Windows Key-Point menu down to a new place. I discovered that some minutes ago,

2112 · Nov 11, 2024

GusGhanem said:
Try these: Download Dolby AC-3/AC-4 Installer - MajorGeeks

Thank you very much! :)

The Dolby AC-3/AC-4 Installer is by far the best decoder in this thread since Windows Media Player as well as Adobe Premiere Pro got audio. I am not a heavy user of Windows Media Player but when i open a file with Dolby Digital audio i get only the video and a pop-up saying that the audio codec is no longer included. That issue is gone as well now! :)

Almighty1 · Nov 13, 2024

2112 said:
Thank you very much! :)

The Dolby AC-3/AC-4 Installer is by far the best decoder in this thread since Windows Media Player as well as Adobe Premiere Pro got audio. I am not a heavy user of Windows Media Player but when i open a file with Dolby Digital audio i get only the video and a pop-up saying that the audio codec is no longer included. That issue is gone as well now! :)

Does the AnWave not work for everything? Speaking about AnWave, I thought Dolby Digital Atmos would have included Dolby AC-4? Maybe we can let AnWave's author @uncyler825 answer that one.

VladdyProsa · Nov 13, 2024

This is a simpler stand-alone app from the same author that can be used to install Microsoft Dolby Digital Atmos CODECS on Windows 10/11

AnWave-Split (2024)

:))

Almighty1 · Nov 13, 2024

VladdyProsa said:
This is a simpler stand-alone app from the same author that can be used to install Microsoft Dolby Digital Atmos CODECS on Windows 10/11

AnWave-Split (2024)

:))

That is mentioned in comment #29. AnWave is also a stand-alone app. Does Dolby Digital Atmos mean AC-3 or also AC-4 as it's confusing.

2112 · Nov 13, 2024

Almighty1 said:
Does the AnWave not work for everything? Speaking about AnWave, I thought Dolby Digital Atmos would have included Dolby AC-4? Maybe we can let AnWave's author @uncyler825 answer that one.

For me AnWave worked with Adobe apps such as Premiere Pro 2025 but Windows Media Player still gave a pop-up saying that the Dolby codec is not there and was silent, ie no audio. This was with AnWave "standard" and the AnWave stand-alone app. This was solved when i used Dolby AC-3/AC-4 Installer from MajorGeeks.

uncyler825 · Nov 13, 2024

Almighty1 said:
Does the AnWave not work for everything? Speaking about AnWave, I thought Dolby Digital Atmos would have included Dolby AC-4? Maybe we can let AnWave's author @uncyler825 answer that one.

Microsoft Dolby Digital Atmos Pack:
You can view these details via dxdiag.exe > Save All Infomation. The AC-3 MFT files from Windows 11 23H2 Build 22631.4317 (Install.wim).

Microsoft DSHOW AC3 Decoder,0x005fffff,1,1,msmpeg2ac3dec.dll,10.00.26100.0001
Microsoft AC-3 Encoder,0x00200000,1,1,msac3enc.dll,10.00.22621.2506
Microsoft Dolby Digital Plus Decoder MFT, {177C0AFE-900B-48D4-9E4C-57ADD250B3D4}, 0x1, DolbyDecMFT.dll, 10.00.22621.4249

2112 said:
Windows Media Player still gave a pop-up saying that the Dolby codec is not there and was silent.

Windows Media Player still gave a pop-up saying that the Dolby codec is not there and was silent. It's only need install Microsoft Dolby Audio Extensions. Download: Microsoft.DolbyAudioExtensions_1.0.61521.0_x64__8wekyb3d8bbwe.appx

【HOW-TO】Restore Microsoft Dolby Digital Decoder/Encoder MFT support in Windows 11, version 24H2 · SimonMacer AnWave · Discussion #14

Almighty1 · Nov 13, 2024

GusGhanem said:
Dolby TrueHD, Dolby Digital Plus (E-AC-3) and Dolby AC-4 can contain Atmos.

Thanks and Interesting, I think I was confused because Dolby Digital originally as it was known was also known as AC-3 so I thought AC-4 was another name for Dolby Atmos. Haven't kept up with the different Dolby names. Which one is the more superior audio, Dolby TrueHD or Dolby AC-4 as it seems Dolby Atmos is more to add up to 64 speakers to any of the three you mentioned. Can Download Dolby AC-3/AC-4 Installer - MajorGeeks also handle Dolby TrueHD?

antspants · Nov 13, 2024

GusGhanem said:
I'm actually not familiar with Dolby (surround)

The closest I ever recall hearing it was in a test app to show you the effects. I remember thinking… meh.
Great if you have a 7.1 surround system. I did have (have new ones now) 7.1 enabled headphones. I must admit, it sounds great with movies and games, but this many years later, I have no idea what driver is uses to pass it through to my headphones.

uncyler825 · Nov 13, 2024

Almighty1 said:
Thanks and Interesting, I think I was confused because Dolby Digital originally as it was known was also known as AC-3 so I thought AC-4 was another name for Dolby Atmos. Haven't kept up with the different Dolby names. Which one is the more superior audio, Dolby TrueHD or Dolby AC-4 as it seems Dolby Atmos is more to add up to 64 speakers to any of the three you mentioned. Can Download Dolby AC-3/AC-4 Installer - MajorGeeks also handle Dolby TrueHD?

I haven't used Dolby AC-3/AC-4 Installer - MajorGeeks.

Windows 11 23H2 Build 22631 or earlier already contains native Dolby Digital supports. Basically, just install the AC-3 files from the previous version onto the 24H2.

Almighty1 · Nov 14, 2024

GusGhanem said:
I'm actually not familiar with Dolby (surround) as I've never had hardware or setup that uses it, but from what I read, Atmos is an extension to those 3 Dolby formats which adds vertical audio information similar to video game positional audio

I haven't either since I have always had only a dual channel setup. People used to think Lexicon's Logic 7 was the best when it came to surround sound.

AC-3 (Dolby Digital) codec no longer included with Windows 11 version 24H2

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