I try to explain. I think it has to do with the velocity. If I use a sound (on my computer soundcard synth)
which is independent of velocity (organ sound) the volume is normal and everything works fine.
But if I use a piano or something similar the
volume becomes low and even if I hit hard on the D-50 the volume is extremely low. You mentioned midi Mainvolume.
If the mainvolume was adjustable from the D-50 there were no problems (I mean some way to turn the midi volume messages
from the D-50 louder). But I don't know how to do that. Or if the velocity on the D-50 somehow was adjustable? Where do I find the eprom version of the D-50?
Thank you