I can do this same thing on the psr 2100.
I can load a midi file, choose which voices I want to use and then save them together. Next time I load that midi file the saved voices come up with it. It also saves the vocal settings and any other setting I would imagine. Any setting that can be transmitted via midi file. It will set up my footswitch settings etc. whatever configurations the board is in when I save the file.

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The old Newb