AC-3 ACM Codec is a very useful AC3 Decompressor for VirtualDub. Based on the open source liba52 library by Aaron Holtzman and Michel Lespinasse, and the open source FFmpeg ac3enc code by Fabrice Bellard.

An Audio Compression Manager interface around the free liba52 library by Aaron Holtzman and Michel Lespinasse, and the ac3enc code by Fabrice Bellard from ffmpeg. This makes it possible to preview, decode, and encode AC-3 audio in VirtualDub (or almost any ACM client).

The core is based on liba52, and it works with most any ACM client (VirtualDub, TMPGEnc, Avisynth, CoolEdit, etc).

If youve never installed the decompressor before, simply right-click on the "AC3ACM.inf" file, and choose "Install" from the popup menu. I dont think its necessary to reboot, but it cant 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 Panels "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, it is recommended that you uninstall the old version as described above, and reboot Windows before installing this version. (Its probably not necessary to do all that, but again, it cant hurt.)

Note that this zip contains two builds of the codec. The files in the "x86" folder are for use with 32-bit applications, and the files in the "x64" folder are for use with 64-bit applications.

The license of this software is Free, you can free download and free use this audio utility software.