An mf3 file extension is associated with the audio format used by Ensoniq MR-76 keyboards.
MF3 file extension - Ensoniq MR-76 audio data
What is mf3 file? How to open mf3 files?
File type specification:
The mf3 file extension is related to some audio files used in older Ensoniq MR-76 audio synthesizers and keyboards.
These files are created when "Save as song" option is used.
This mf3 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.