Snoopy, thank you. I've downloaded the demo and I'm trying to get it to do the job. So far, I can get it to address User voice bank or other GM sounds - pretty good but not the default Ketron instruments I'm looking for.
Funnily enough, if I play the midi file from the PC and connect the midi lead to input 2 keyboard (as opposed to input 1, midi) I get great sounds. I might connect midi output 1 to input two on the same keyboard and play from the ketron that way - as a sort of hack.
bzw, I tried what you suggested but only General Midi sounds are available according to the menu title. If I power on the Ketron and play a little piano and then press the 'Play' button while playing - I can hear the piano change from the nice Ketron one to the GM one. This is the same GM piano that is made available under the F1 (GM PART -> Parts) menu.
By "any onboard sounds except programs" do you mean the primary instrument sounds of the SD1, the ones that sound really good?
Many thanks,
Jarlath