An ad2 file extension is associated with the Adaptive Differential Pulse Code Modulation (ADPCM) format.

There is one other file type using
the AD2 file extension!

empty icon.ad2 - ad2 web page script

Detailed description

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AD2 file extension - ADPCM 2-bit compressed voice

What is ad2 file? How to open ad2 files?

File type specification:

Audio and sound file type icon Audio and sound file type

The ad2 file extension is related ADPCM.

Adaptive Differential Pulse Code Modulation (ADPCM) is a lossy compression format, which means that some data is altered and lost during compression.

ADPCM can achieve compression ratios of up to 4:1. 2-bit compressed voice file.

This ad2 file type entry was marked as obsolete and no longer supported file format.

This type of file is no longer actively used and is most likely obsolete. This is typically the case for system files in old operating systems, file types from long discontinued software, or previous versions of certain file types (like documents, projects etc.) that were replaced in higher versions of their original programs.

Help how to open:

This file type is not meant to be opened directly, there is no software that could open and work with it directly, or there is no information available in public sources about opening this file type. This is usually the case of some internal data files, caches, temporary files etc.

How to convert:

As far as we know, this .ad2 file type can't be converted to any other file format. This is usually the case of system, configuration, temporary, or data files containing data exclusive to only one software and used for its own purposes. Also some proprietary or closed file formats cannot be converted to more common file types in order to protect the intellectual property of the developer, which is for example the case of some DRM-protected multimedia files.

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