PG Music created several karaoke programs that included MIDI files. Working from memory but I believe each song had an associated MIDI file for the song melody and an MGU song file to play the song. Song lyrics displayed during playback.

That is the format I remember of their program of 50 Christmas carols. I wish I could find the floppy disk so I could see if an update is available.
_________________________
Jim Fogle - 2022 BiaB (927) RB (Build 5) Ultra+ PAK
Cakewalk - Zoom MRS-8 recorder
Desktop: i7 Win 10 build 2004, 12GB ram 256GB SSD, 4 TB HDD
Laptop: i3 64bit Win 10 build 21H2, 8GB ram 500GB HDD
Music at: https://fogle622.wix.com/fogle622-audio-home