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AC-3 ACM Codec Changelog

What's new in AC-3 ACM Codec 2.1

Dec 27, 2011
  • Fixed an uninstall problem specific to 64-bit Windows.
  • Added experimental support for tag WAVE_FORMAT_EXTENSIBLE.

New in AC-3 ACM Codec 2.0 (Dec 27, 2011)

  • Added decoding support for low sampling rates (BSID9 and BSID10).
  • Fixed some install problems specific to Windows 98.

New in AC-3 ACM Codec 1.9 (Jul 18, 2011)

  • Fixed a decoding bug in AMD64 build when source is stereo.
  • Combined 32-bit and 64-bit assembly code into one module.

New in AC-3 ACM Codec 1.8 (Jul 18, 2011)

  • Fixed corrupt MMX decoding when source is 5 channels.
  • Fixed silent audio on AMD64.

New in AC-3 ACM Codec 1.7 (Jul 2, 2011)

  • Updated .inf and .bat files provided by ale5000. If you are using one of the batch files to install the codec on Windows Vista or higher, you must right click the .bat file and select "Run as Administrator".

New in AC-3 ACM Codec 1.6 (Mar 21, 2011)

  • Major rework of Visual Studio workspaces, but no significant code changes.
  • Moved registry storage location to HKEY_CURRENT_USER\Software\fccHandler\AC3ACM
  • New .inf and .bat files are provided

New in AC-3 ACM Codec 1.5 (Jan 18, 2010)

  • I've ported the code to Visual Studio 2005 and added a new (untested) 64-bit build. Installation instructions are in ReadMe.txt.
  • I've switched to using 7-Zip to archive the source code package.

New in AC-3 ACM Codec 1.4 (Sep 24, 2007)

  • 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).

New in AC-3 ACM Codec 1.31 (Jul 10, 2006)

  • Fixed an MMX bug in the decoding of 3/2 channel AC-3.

New in AC-3 ACM Codec 1.3 (May 12, 2006)

  • Added support for WAVEFORMATEXTENSIBLE PCM input for encoding.
  • Default channel order for PCM input and output has been changed to FL,FR,FC,LF,BL,BR in accordance with Microsoft's recommendation.
  • Added an option to disable MMX in the driver configuration dialog.

New in AC-3 ACM Codec 1.21 (Apr 19, 2006)

  • Added the fix from FFmpeg for a low volume issue in ac3enc.