"In General" For example, a MIDI file contains the following, as seen in my sequencer, PowerTracks Pro Audio, Event List:

Sysex Data:F0 41 10 42 12 40 00 7F 00 41 F7

F0 41 10 42 12 40 01 10 02 02 02 02 02 02 02 02 02 02 02 02 00 00 00 00 17 F7

It's a mystery ot me what that means or what it does, but obviously it does something important.

I'm not sure, but I think that knowing how to encode the correct sysex message in a MIDI file would allow you to control the harmonizer parameters when playing a SMF on the arranger keyboard.