more of a Logic Pro X question .... anyway!

I hooked up my midi Keyboard into REN, then the Ren to MacBook Pro. Ever since I did this my Piano roll is off in Logic.

example: I hit note A and it plays a B flat in Logic.

Now no matter if I disconnect Ren and hook keyboard directly to computer it still has same problem. This was working just fine a couple days ago.

Anyone know what would have been changed in Logic after doing this?

Yes I did install that new beta driver. But I have a feeling that has nothing to do with it. I think it is just a setting in Logic that got messed up.

I don't know how to fix your issue, but I do know that before plugging you keyboard into logic is was in a mode called "Chronological"... the MPC is not chronological, for some stupid reason that I never fully understand. This means that, the MPC's pads are not in the same sequence as your keyboard, you can;t play Do Ray Me Fa So La Ti Do by playing hitting one pad after the next.

With that said, you MPC switched your keyboard out of chronological mode, and now you need to figure out to reprogram it back.

The good news though is that it might be an easy fix.