A muz file extension is related to the Hover! video game. A muz file stores midi data.
MUZ file extension - Hover! MIDI data
What is muz file? How to open muz files?
File type specification:
The muz file extension was used for music data in the old computer game called Hover!
Most likely some old format without support from developer. No further information could be found.
This muz 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.