X Codec Pack 3 Is Here - and 3.1 Is Already the Build to Get

The teaser is gone from xcodecpack.com, and the thing it was teasing has already shipped twice.

In April this article said X Codec Pack 3 was coming and that nobody knew when.

It came, and then it got a point release.

X Codec Pack 3.1 is the current build - 64-bit only, Windows 10 and 11, no toolbars, nothing bundled.

What Actually Shipped

Version 3.0 was the real event: a ground-up rebuild, native 64-bit, after years in which the pack barely moved at all. Version 3.1 is the quieter follow-up that refreshed the parts inside it.

The two that matter are the decoder and the player. LAV Filters moved from 0.81 to 0.83, and the bundled MPC-HC jumped from 2.6.4 to 2.8.1, which is a year of catching up in one step.

The rest of the component list, and what each piece does, is on the X Codec Pack 3.1 page. The short version is that the installer grew by about a megabyte and everything inside it is current.

The Audio Problem That Started All This

None of this came out of nowhere. Microsoft removed the built-in AC-3 decoder in the Windows 11 24H2 update, and a lot of people woke up to MKV files and DVD rips that played perfectly with no sound at all.

X Audio Codec Pack 1.5 exists for exactly that. It is an audio-only bundle, so if your picture is fine and only the sound is missing, you do not need the full pack.

It has grown since April too - eleven DirectShow audio filters now instead of seven, still with a silent install switch for anyone deploying it across a lot of machines.

It Is Four Tools Now, Not One

The bigger change since April is that this stopped being one product with a long gap between releases.

X Audio Converter 1.1 turns WAV, FLAC, OGG, M4A, WMA, AIFF and Opus into MP3 without uploading anything to a server. There is a browser version that runs anywhere and a Windows app that is considerably faster.

X Codec Inspector 1.2 did not exist when this article was first written. It lists every DirectShow filter and Media Foundation transform on your PC, which is how you find out why one player handles a file and another one chokes on it.

All four are free, and all four install to the system rather than dropping a launcher on your desktop. The xcodecpack.com homepage now just says "Play any format. Zero bloat." - the buffering joke has been retired.

Two more are converters rather than codecs, and each comes both ways - in the browser or as a free Windows app. The X M3U Converter switches playlists between M3U, M3U8, PLS, XSPF and WPL, and the browser version does all of it in the page, so nothing is uploaded. The X Sample Rate Converter resamples audio between 8 kHz and 192 kHz, though its browser version sends the file to a server and back - the Windows app works fully offline.

Which One You Actually Need

Most people only need one of these, and the symptom tells you which.

If you already have an older X Codec Pack on the machine, uninstall it before installing 3.1. Leftover registrations from an older build are the usual reason playback starts stuttering after an upgrade.

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