Files with ad4 extension can be found as audio files used by 4D Systems. Probably a highly and also obsolete audio format.

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AD4 file extension - 4D Systems audio

What is ad4 file? How to open ad4 files?

File type specification:

Audio and sound file type icon Audio and sound file type

The ad4 file extension is related to a proprietary audio format used by 4D Systems in their solutions.

Probably not used outside 4D Systems programs. Might also be no longer used.

This ad4 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 AD4 files:

Only the old 4D Systems programs were known to use this particular audio file type.

How to convert file with extension AD4:

We do not know about any possible conversion at this time, however audio files theoretically can be converted to other similar formats.

Related links:

4D Systems website

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