How did you solve your MS20 problem years back? I have a Kenton with the same problem you had where it was acting like Portamento was on? I never saw a response back to your thread so I have no idea weather you fixed it or not? Also whatever the solution I will post a response so it will help other people.
Recently i bought a wave 2,2 updated to 2,3, a prk-fd keyboard and thre EVUs with midi. I had the wave refurbished with new Roms, backlight and keyboard kit from virtual music, and then sold it. Before selling it i tested it with thr prk-fd keyboard, and the EVUs and everything worked as far as i could tell.
My problem now is that the PRK-FD does not seem to work as a standcalone midi master keyboard, and i cannot comunicate with the EVUs. When i go thru the midi set up on the PRK it seems to skip "C" "select midi channel".
I can get some sounds out of the EVUs with another midi keyboard but cannot change any parameters. The PRK however does not work with the EVUs or any other midi instruments. Is there a way to control the parameters of the EVUs using sysex or some other software or app? What is going on with PRK?
I am planning on selling them but I want to figure all this out first. Any ideas?
Many thanks and look forward to hearing from you,