Opening a DAC File

The DAC file type is primarily associated with Dolby Atmos Designer.

DAC	File extension: DAC
	File type:	data file

What is a DAC file?

DAC files mostly belong to Dolby Atmos Designer.

This file extension, DAC, serves several specialized purposes rather than a single function. It can hold different types of data depending on the software that creates it.

• Dolby Atmos Configuration Backup: This type uses a ZIP structure to store audio system settings for Dolby Atmos Designer. It is a backup file that preserves configuration data.
• Geoid Height Data File: In this case the file contains geospatial information used by GMT. It provides geoid height measurements and is sometimes called a Digital Audio Control data file. More details can be found at GeographicLib.
• Dance Animation or Choreography Data: Some DAC files record dance motions and choreography details, which software like Dance eJay or DanceStepMania use.
• FEFLOW Computational Results File: Other DAC files carry the output from hydrological and groundwater modeling performed by FEFLOW.

FilExt.com notes: Each file variant uses its own internal structure. Check file headers or open the file with its associated program to view its contents. Always keep an original copy before making changes.

How to open DAC files

You need a suitable software like Dolby Atmos Designer to open a DAC file. Without proper software you will receive a Windows message "How do you want to open this file?" or "Windows cannot open this file" or a similar Mac/iPhone/Android alert. If you cannot open your DAC file correctly, try to right-click or long-press the file. Then click "Open with" and choose an application. You can also display a DAC file directly in the browser:. Just drag the file onto this browser window and drop it.

Online DAC Text Viewer

Choose your .dac file to analyze

or drag and drop it here

Online File Viewer

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DAC file format:

Every file has a defined file format, i.e. how the data is arranged in the file. Often, the file format can be deduced from the file extension or the initial bytes (called the signature). However, different programs can use the same file extension. Furthermore, a file extension can be renamed incorrectly and double-clicking on it will then display an error when it is opened. Exact knowledge of the format is therefore important in order to solve problems occurring in files. Our evaluation of the DAC files is as follows:

The DAC file extension is rather rarely used and includes very many different file formats. However, the following two file formats are common:

• 10% of all DAC files use the ZIP format, so several files are compressed and saved in one DAC file. 3 to 14 compressed files with names like \backup\ACMainsCommand.json, \backup\AES67SessionList.json, \backup\AlertMessageList.json, \backup\ChannelConfigSettings.json, \backup\DACSettings.json, \backup\DmaDiscoveryInfo.json, \backup\GlobalDelay.json, \backup\HardwareInfo.json, \backup\NetworkSettings.json, \backup\Password.json, \backup\ScreenName.json, \backup\SpeakerProcessingBasicSe, \cp850\parameters.txt and \cp850\settings.tgz are common. You can see the included files and images by renaming the file extension to .zip and then double-clicking it. DAC files can be up to 460 KB in size, but are often around 3 KB - 290 KB. The following keywords are characteristic: dolbyAtmosConfiguration. The following filename is common: 1.dac.
• 8% of all DAC files use the same file format, which can be identified by the letters "05 51 05 51 05 51 05 51 05 51 05 51 05 51 05 51" at the beginning. The content consists of illegible binary data, which can only be read and interpreted by the associated programs. The files are 2 MB to 2 MB in size, with a median of 2 MB. A common filename is WW15MGH.DAC.

All other DAC files (82%) have no consistent format, such as FEFLOW. They are often associated with player, pikachu, data, resource, created or center. If you want to find out which format your DAC file belongs to, just click on the button "Choose your .dac file to analyze".