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 recognised.

Download AC-3 Decompressor

How to install/uninstall AC-3 ACM Decompressor :

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 Decompressor solves the missing audio codec error, reported by GSpot: ac3 (0x2000) Dolby Laboratories, Inc

Changes in AC-3 ACM Decompressor 1.4 :

- Fixed an A/V sync problem when encoding 44100 Hz AC-3.
- If you insert AC3ACM into a DirectShow filter graph as an AC-3 encoder, it chooses a default bitrate based on the number of source channels. The default is (96 * nChannels) kBit/s. I've added an option in the driver configuration dialog which allows you to change the default to (64 * nChannels).