AC-3 ACM Codec 2.2

Updated: 22 Jul 2012 | Freeware | 143KB | Downloads: 1169832

AC-3 ACM Codec (formerly AC-3 ACM Decompressor) offers Dolby Digital AC-3 decoding for Windows ACM. Install this and you can convert/decompress AC3 audio directly to WAV / MP3 using VirtualDub.
This also works with AviSynth, TMPGEnc, allowing you to use AC3 encoded AVI files, not normally recognized.

How to install/uninstall AC-3 ACM Codec:

If you've never installed the decompressor before, simply right-click on the "AC3ACM.inf" file, and choose "Install" from the popup menu. I don't think it's necessary to reboot, but it can't hurt. If you get a scary warning that the program has not passed "Windows Logo testing" (which is quite true BTW), choose to "Continue Anyway."

To uninstall the decompressor, start Control Panel's "Add/Remove Programs" dialog, select "AC-3 ACM Decompressor", and press the "Add/Remove" button.

If you have installed a previous version of the decompressor, I recommend you uninstall the old version as described above, and reboot Windows before installing this version. (It's probably not necessary to do all that, but again, it can't hurt.)

Tags :

- AC-3 ACM Codec solves the missing audio codec error, reported by GSpot: ac3 (0x2000) Dolby Laboratories, Inc

Changes in AC-3 ACM Codec 2.2:

- By request the x86 version now works on Windows 95 OSR2 and Windows NT 4.
- Fixed an uninstall problem specific to 64-bit Windows.
- Added experimental support for tag WAVE_FORMAT_EXTENSIBLE.


AC-3 ACM Codec (formerly AC-3 ACM Decompressor) 1.9
on 26 September 2011, reviewed by: dissapointed


I downloaded it and it wont allow me to install the 32 bit version even though my laptop is 32, also when i try the 64 it says a file is missing even though the missing file is right next to it.

Any advice would be helpful! The file it says its missing is AC3ACM.inf


AC-3 ACM Codec (formerly AC-3 ACM Decompressor) 1.9
on 20 August 2011, reviewed by: herosz


appears 5.1 channels but unfortunatelly only 2 channels compression works :(
VirtualDub says : The audio codec cannot compress to the desired format


AC-3 ACM Codec (formerly AC-3 ACM Decompressor) 1.9
on 16 July 2011, reviewed by: Steve Kim


It works perfectly.
Now I can encode the video stream with Dolby AC3 when I record the HDTV.


Print AC-3 ACM Codec

AC3 Filter: is DirectShow filter for AC3 decoding to play .AVI with AC3 audio tracks and MPEG2 (DVD).

WinampAC3: is a Winamp 2 and 5 input plugin to play .ac3 files.

Valex AC3/DTS codec: is ACM decoder that allows any VFW application to play .AVI with AC3 or DTS audio tracks.

AC3 Decoder: AC3 Decoder is a convertor for AC3 files to WAV, MP3, WMA. AC3 file can contains up to 6 audio channels.

AC3 Delay Corrector: solves the problems when you try to resynchronize the demultiplexed mpg-streams.

AC3fix: corrects any bad frames within AC3 files.

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