The following table lists the supported Dolby channel configurations. If the attribute is not set, the decoder uses a default channel mask, based on the number of channels. If specified, the value must be consistent with the number of audio channels. Specifies the assignment of audio channels to speaker positions. If this attribute is not set, the default value is 2 (stereo). Valid values are in the range 1 (mono) to 8 (7.1 channel configuration). Number of channels, including the low frequency (LFE) channel, if present. Dolby AC-3 streams are limited to the three highest rates in this list. If this attribute is not set, the default value is 48000.
The following table lists the requires and optional attributes for the input media type. This subtype can be used interchangeably with MEDIASUBTYPE_DOLBY_AC3. Subtypeĭolby Digital audio see Audio Subtypes. The Dolby audio decoder supports the following input subtypes. The class identifier (CLSID) of the Dolby audio decoder is CLSID_CMSDDPlusDecMFT, defined in the header file wmcodecdsp.h. The decoder can also convert a Dolby Digital Plus stream to Dolby Digital format for AC-3 S/PIDF output, or format a Dolby Digital Plus stream for HDMI digital output. It works with audio sample rates of up to 48 kHz.ĪC-3 ACM Codec uses two open source libraries: liba52 and FFmpeg ac3enc.Īnd it solves the missing audio codec error, reported by GSpot: ac3 (0x2000) Dolby Laboratories, IncĪt a size of less than 200KB and using a very low amount of system resources, AC-3 ACM Codec is an addition you’ll barely notice but which will add value to your media experience.ĭecoding Dolby Digital AC-3 formats for Windows ACM has never been simpler.For versions of Windows prior to Windows 8, the Microsoft implementation of the Dolby Digital technology is restricted under terms of the Dolby Digital licensing program to use by Microsoft applications.įor more information about these formats, refer to Advanced Television Systems Committee (ATSC) document Digital Audio Compression Standard (AC-3, E-AC-3) Revision B. bat file.ĪC-3 ACM Codec offers support for six sound channels, from 20 to 20,000 Hz. Another installation method is double clicking on the. Moreover, there are two versions, one for x86 and another for 圆4 systems. When you already have an older version of this software, uninstall before installing a new one. In case you want to uninstall this tool, go to Control Panel, “Add/Remove programs” and uninstall AC-3 ACM Codec like any other application. Ignore any warnings which tell you that the program has not passed “Windows Logo testing”. What you have to do first is to do a right-click on the "AC3ACM.inf" and select install. The installation process of AC-3 ACM Codec is different from your average computer problem, but not that complicated either.
These are other ACM clients available on the market which use external codecs for compressing certain file formats. Using VirtualDub, on condition that you have this codec installed to your computer, you can convert AC3 audio directly to WAV or MP3 formats.ĪC-3 ACM Codec is a good addition to your system if you use AviSynth or TMPGEnc, too.
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