chulaivet, actually I have only one Midisport 2x2 active at this time. The other is a spare, as is that Roland adapter. I bought the Roland because somebody convinced me that the Midisport was defective, but I have the same problem with it too. I'm pretty sure the Midisport is ok, because it used to work just fine. Which has led me to wonder if maybe a Windows update may have caused the problem I'm having. Cuz one day it was working fine and then the next day it wasn't.

If it is a windows compatibility issue, I don't hold out a lot of hope. M-Audio's most recent driver for the Midisports is already several years old. But I must also remind myself that I had the same problem with the Roland too. So I'm hoping it was user error of some unknown type. Just haven't figured out yet what it might be.

Best,
Michael

My Music:
https://soundcloud.com/michaelmcbroom/albums