updated
Aug 12, 2026
22.8MB
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615
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X Audio Codec Pack is a free installer that registers eleven open-source DirectShow audio filters on Windows, restoring the AC-3, DTS and Dolby Digital playback that Windows 11 24H2 removed, with nothing bundled and no paid tier.
Microsoft removed the built-in AC-3 decoder in that update, and it does not tell you.
There is no error message and no warning icon - the file opens, the picture is fine, and the sound is simply gone.
X Audio Codec Pack puts it back in one installer, registering eleven open-source DirectShow audio filters so your existing players pick them up on their own.
LAV Audio Decoder, the One That Fixes It
The short version. If your sound died after 24H2, tick LAV Audio and leave the other ten unticked. That is the whole fix.
LAV Audio Decoder is the only required component, and the reason almost everyone downloads this pack. Version 1.5 ships LAV Audio 0.82, the same build as the standalone LAV Filters release.
It decodes AC3, E-AC3, DTS, DTS-HD, TrueHD, Dolby Atmos, AAC, HE-AAC, MP3, FLAC, Opus, Vorbis, WMA and PCM. That is essentially every audio format in active use.
Once installed it registers as a DirectShow filter, so any player built on DirectShow routes audio through it without being told - Windows Media Player and MPC-HC included.
Decoding and Output
Three optional components change how audio is decoded or how it leaves your machine. Each has its own checkbox in the installer.
| Component | What it does | Add it if |
|---|---|---|
| MPC Audio Decoder | A second decoder covering MP3, AAC, AC3 and DTS | Another filter chain has already claimed LAV Audio and you need a backup path |
| MPC Audio Renderer | WASAPI output that bypasses the Windows mixer entirely in exclusive mode | You want a bit-perfect signal to a DAC or AV receiver, rather than casual viewing |
| MPC AudioSwitcher | Channel mixing, volume normalization and audio delay compensation | Your MKV files carry several audio tracks, or the sound runs ahead of the picture |
Opening Standalone Files and Streams
The remaining seven exist for files that are audio and nothing else, plus internet radio. A decoder alone cannot open these - something has to read the container first.
| Component | What it opens | Add it if |
|---|---|---|
| DTS/AC3/DD+ Source Filter | Standalone .dts, .ac3 and .eac3 files | Double-clicking a .dts file in Explorer currently does nothing at all |
| MPC Audio Splitter | FLAC, WAV, AIFF, OGG and Opus files | You play lossless music through MPC-BE |
| MPEG Audio Splitter | Standalone .mp3, .mp2, .mpa and raw .aac files | A bare MP3 or AAC file will not open in your DirectShow player |
| Ogg Splitter | .ogg, .oga, .opus and .spx, including chained multi-stream files | You have Ogg or Opus audio, especially long chained recordings |
| CDDA Reader | Audio CD tracks, turned into a wave stream players can read | You still play CDs and want them to open without extra software |
| Shoutcast Source | Shoutcast and Icecast radio streams by URL, with track titles | You listen to internet radio and want it in your desktop player |
| AVI to AC3 Filter | AC3 and DTS audio stored inside AVI files, repackaged so it decodes | An old AVI plays video fine but stays silent even after installing LAV Audio |
Who Needs This Pack
The Windows 11 24H2 regression is why most people arrive here. If you upgraded and lost sound on files that played perfectly the week before, particularly DVD rips and older MKVs carrying AC-3 or Dolby Digital, LAV Audio restores it immediately.
A fresh Windows install is the other case. Microsoft's default audio coverage has always had holes around DTS and Dolby Digital Plus, and this saves you collecting filters from half a dozen different places.
If you are not sure what your file is actually missing, start with the Codec Finder, which names the exact decoder a file needs. The Codec Troubleshooter walks through the common failures step by step if you would rather be asked questions.
How to Install
- Run the installer with administrator rights.
- Tick LAV Audio - it is the only required selection - and add any of the other ten you need.
- Finish the install. No restart is needed.
- Open a file that was silent before and confirm the sound is back.
Silent install works with the /S flag, which makes this practical for IT deployments or scripted setups across a fleet of machines.
For the deeper configuration - how LAV Audio slots into your player's filter chain, and how to set up bitstreaming for TrueHD or DTS-HD passthrough to a receiver - our guide on getting more out of your media player with LAV Filters covers it properly.
This Pack or the Full LAV Filters
The standalone LAV Filters download gives you the full trio: LAV Splitter, LAV Video and LAV Audio. If you want all three, take that one instead.
X Audio Codec Pack exists for the case where video is fine and only sound is broken. It installs LAV Audio without touching your splitter or video decoder setup, which is exactly what you want when the rest of the chain already works.
The old alternative is AC3 Filter, which predates LAV Audio and has had no update since 2013. Its equalizer and dynamic range controls are still genuinely good, but for the 24H2 fix specifically, LAV Audio is the modern answer.
Compatibility
X Audio Codec Pack 1.5 runs on Windows 7 through Windows 11, 32-bit and 64-bit, and every component is open source. The installer is clean - no spyware, no adware, nothing bundled - and it uninstalls cleanly.
If you want video covered too, the X Codec Pack is the full pack from the same team. The K-Lite Codec Pack is the other route, bundling LAV Filters with video decoders, splitters and a pre-configured player.
More single-purpose filters live in our Audio Codecs section if you would rather install one thing than a pack.
Download X Audio Codec Pack 1.5 and see whether it brings your sound back, or tell us how you got on if you have used it before.
