Interesting...
I think the hardest part is to identify the patterns in the midi so you can turn that into MMA sequences. I don't know the internals of the Yamaha Style files but I guess the meta-data you mention describes the pattern structure so you can use this instead of having to figure out yourself.
@sciurius, indeed the metadata as I understood (read a little about the SFF1 format) that is predominantly of interest to MMA would be:
- The time-duration (begin-end) of midi event that signify the pattern segments like Intro-1, Intro-2, Main-1, Main-2, Fill-1, Fill-2, Outtro-1, Outtro-2 (or similar names, I keep confusing).
- Human readable description of the style (genre, perhaps a valid BPM range)
I could, try to convert the exported midi into a Yamaha SFF1 style, it is a bit more manual work, few more discrete manual steps using different Windows applications (which is what I am trying to avoid).