So now, present time, my 4k sits in the closet.
MPC X and Key61 and have taken over MPC duties.
(let me hold dat! I know I'll get it out my system in about 2 months and ill give it back!)
I got GAS and for some reason I got my Heart Set on MPC 4K as that is the only classic I Like that floats into my price range once in while.
Even Though... I own a X, a LIVE 2, A Force, A MV8000, and a Push 2....
To Break My GAS I Pull up old 4K VS X threads on several different forum sites and Read the ones that say "Your Crazy X is light Years ahead of a 4k" etc.
So when I came across a possible answer for a question I didn't understand dropped here.
As Far as midi and jitter....
All I know is been Tracking out on my X in standalone mode. I just turn on Ableton link... The X and Ableton sync up and I push play on the X, it triggers Ableton and I record my tracks in.