Hello planetearth,
Thanks for your kind reply.
Yes, I would like to make the .ins file by myself. I already made neat excel and txt files where I copied every voice name from PDF-manual and it's corresponding SP5500 voice number and tidied up the list so I could easily add it by copying and pasting them to some "skeleton" .ins file with proper formatting.
Problem I still have, is that the 559 voices/instruments do not seem to correspond to any logical MIDI bank/patch signals. 128 General MIDI voices/instruments correspond with General MIDI standard, but I cannot seem to choose any of the other voices out of the 559 total.
As probably everyone knows, for 128 GM instruments there's .ins definition with every version of Sonar, so yes, I can use them properly.
It's not the end of the world and I probably would not use the SP5500 voices anyway when making end product. But it would be nice and straightforward to harness all the voices of SP5500 when making drafts/demos/experiments with plain MIDI before working out the songs with proper VSTi instruments for example.
SP5500 is very low-budget instrument so the voices are not too great, so it's not a big deal, but it baffles me why would any synth/stage piano manufacturer load so many sounds to an instrument that has MIDI capabilities, but not allowing to control or choose but only 128 of them via MIDI.
If I later find out that the voices are divided into banks that I'm able to change via MIDI, I would be happy, but until then I guess I just have to live with the 128 voices when not playing live and manually choosing SP5500 voices.
Thanks again for tips. :)