I am new here, but I'll try my best to explain it as clear as I can.
I have a keyboard - Casio LK300-TV. A simple one, capable of lessons for piano, karaoke, and many other features. But what I am mostly interested in - the sound bank. It could be called also the Soundblaster for a pretty clear reason too. On the keyboard itself it is entitled as "tones". It has 513 of em, 13 of them which are drum sets, and all other - midi instruments of course, pianos, percussions, organs, synths etc. It works really well when you playing songs all by yourself. By the way, there is one instrument you're not capable playing by yourself - timpani but you can hear it the other way.
What I really was exited about - it can play midis from a SD card. How did it work? It worked well and I liked it first times through. Before doing so you have to convert the midis through special soft, not really a problem. But with changing midis I have spotted the problem with the midi playback. Instruments reacted very differently than they supposed to be in terms of how loud they were. No matter - just opened the editor, pulled a few volume states up and down and it became way more balanced.
Then I realized that the midis themselves sound a bit off. Very flat. In original case there are around 200 presets to choose and they have perfect combination between each other whatever it is supposed to be played on but not here. Here we have 500 of them. Some categories like pianos has as double variations while the original has less. Before playing it picks the patch that the more close to the one picked in the midi itself. My theory that among those 500 patched there are secondary numbers that attached to the patches that match the 200 instruments from the vanilla midi one. I think that is the reason why that soft is need to be used making the midis compatible to play. But in this case it does not sound as impressive as it could be. But those other patches has so much depth, they could be used to remaster music from old games - it is still in demand and will be in a next decade.
So, I actually thought of two possibilities to solve the problem. The first one, to translate the chip into the sound bank to be compatible, for example, with Fruity LSD so I will not need to use the keyboard itself. Reading the internet, specifications, technical info I have come to logical conclusion that it is not possible. And the second, to find a way to configure an existing midi yourself, so you can attach the exact instrument from the 500 patches of the keyboard so the music from the midi will have more depth and will not be as flat anymore.
If you want to look on a keyboard itself I will attach a link containing the official page of it.