I need help connecting my Casio CTK-551 piano to my pro 40 interface. I had just connected it and recorded a clip with it and noticed that it took about 1 second for me to hear the note i played after I hit the key. I just try to reconnect the piano so I could tell you the steps i took, but I could'nt remember what i did. so 2 questions? What it the correct way to connect my piano to the interface via midi cable. Second, how do i get rid of the lag?