Thanks to @liam48D for his idea with cloning and playing sounds. This reads and plays an *actual standard MIDI file* from the list MIDI FILE, but so far, it'll only play the first track, only some messages work, the division is interpreted wrong, and only MIDI file formats 0 and 1 work. The only messages supported so far are PROGRAM CHANGE, NOTE ON, and NOTE OFF. All others are ignored. Note: List operations force screen refreshes if the list is showing, so you'll get better performance if you hide the list MIDI FILE.
