My midi controller, a three year old AKAI MPK249, plays notes a half step higher than the key I press. That is to say when I press the "C" note a C# plays into my headphones and onto my project, however the correct notes show on the "piano roll" editor. It does this on all notes on the controller. I have tried the factory reset and been all over google seeking advice on how to fix this issue. Pitch and mod wheels are at zero and taped so they cannot move, the transpose feature is at zero..the keys and unit are very clean, it is always covered when not in use, of course I have disconnected it and re-started it several times.. it happens in different DAWs I have experimented with... I am about to go crazy? Does anybody have any ideas what the problem could be? Thanks in advance!