Once again, I simply point out that the reason it was impractical was the refusal to standardize the codes for Style Divisions.

Just as it would be impractical to do what you suggest here if the manufacturers hadn't standardized how you call up sounds, or how you send note information, etc., etc..

All it takes is an agreement, and things become simple.
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An arranger is just a tool. What matters is what you build with it..!