Sentence:  "I went in with the computer and I <WSD>velocitized</WSD> it. In other words, I would redefine how John was hitting the strikes," Ken explains. "Electronic pads aren't sensitive enough yet to really reproduce his inflections. So I would do the velocity — which is how hard he is hitting — of every single beat of the entire composition. ..." 
Meaning of the word marked with <WSD> tags:  To adjust the velocity of.