An mgv file extension is related to the Yamaha MegaVoice software. An mgv file contains audio data.
There is one other file type using
the MGV file extension!
.mgv - Sony PSP video data
MGV file extension - Yamaha MegaVoice audio data
What is mgv file? How to open mgv files?
The mgv file extension is associated with the Yamaha keyboards. File contains audio in MegaVoice format.
Most likely some old format without support from developer. No further information could be found.
This mgv 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.