Yeah, but that's making an SMF of the output, NOT an actual style...

How do you deal with the notes, triggers and non-pitched sounds all being on one track? Would you separate those out onto different tracks, so some can be transposed according to the chord, and some not? And it still doesn't deal with the issue of the Guitar Mode providing accurate guitar voicings for every chord, including open and barré chording, whereas whatever engine plays it on the MS is going to impose some generic NTT that is going to destroy the voicing.

The devil is in the details, my friend...
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An arranger is just a tool. What matters is what you build with it..!