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AD4 file extension

The table below provides useful information about the .ad4 file extension. It answers questions such as:

  • What is the .ad4 file?
  • What program do I need to open a .ad4 file?
  • How can the .ad4 file be opened, edited or printed?
  • How can I convert .ad4 files to another format?

Table of Contents

We hope you find this page helpful and a valuable resource!

1 extension(s) and 0 alias(es) found in database

✅ 4-bit ADPCM Compressed Audio

AD4 file is a 4-bit ADPCM Compressed Audio. Adaptive Differential Pulse Code Modulation (ADPCM) is a digital compression technique used mainly for speech compression in telecommunications.
AD4 format description not yet available
Category: Audio files
Application: SoX
Mime-type: application/octet-stream
Magic number: -
Magic string: -
Sample: -
AD4 aliases:
AD4 related links:
AD4 related extensions:
3-bit ADPCM Compressed Audio

Other types of files may also use the .ad4 file extension.

🚫 The .ad4 file extension is often given incorrectly!

According to the searches on our site, these misspellings were the most common in the past year:

a4d, ad, ade, adr, adt, af4, ar4, as4, d4, da4, qd4

Is it possible that the filename extension is misspelled?

We found the following similar file extensions in our database:

Titan Showfile
Dataphor Source Code
4DIM Model Animation
Alphacam Diecut Tool Data
After Dark Screensaver
Atari ST PaintShop Image
AdTech Perfectfax Document
DSM Application Diagram
Omnis Quartz Segment 4 Data
Audifit v4 Data

🔴 Can't open a .ad4 file?

When you double-click a file to open it, Windows examines the filename extension. If Windows recognizes the filename extension, it opens the file in the program that is associated with that filename extension. When Windows does not recognize a filename extension, you receive the following message:

Windows cannot open this file:


To open this file, Windows needs to know what program you want to use to open it...

If you don't know how to set the .ad4 file association, check the FAQ.

🔴 Can I change the extension of files?

Changing the filename extension of a file is not a good idea. When you change a file's extension, you change the way programs on your computer read the file. The problem is, changing the file extension does not change the file format.

If you have helpful information about the .ad4 file extension, write to us!

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