This was supposed to be a quick tutorial. lol
But should be helpful to people trying to create background music. DYOR with legal derivative works mumbo jumbo if you plan to use said tracks. It's just teaching the method here.
Also, excuse the tangents, just speaking my mind.
Links:
GXSCC
https://gashisoft.web.fc2.com/P/GXSCCB236/indexE.htm
MP3 to MIDI converter
https://www.bearaudiotool.com/mp3-to-midi
▶️ DTube