Files with m22 file extension can be found as old audio recordings from Farallon's MacRecorder.
M22 file extension - Farallon's MacRecorder recording file
What is m22 file? How to open m22 files?
File type specification:
The m22 file extension was reported to us for being used in the past for some sort of audio format record by Farallon's MacRecorder at the 22 sampling rate. Most likely obsolete file type by now.
This m22 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.