VLC registers as default *.mid player but can't play Midi files.
See here: https://forum.videolan.org/viewtopic.php?f=7&t=152187
In Windows VLC will install itself as midi player, but doesn't work then. With the current Version (3.0.16) I don't get this error message anymore, but output will be quiet. So it still doesn't seem to work.
Edited by Flexmaen