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!
.ad2 - ad2 web page script
AD2 file extension - ADPCM 2-bit compressed voice
What is ad2 file? How to open ad2 files?
File type specification:
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.