I am setting up my piano for the first time to run into my Cubase program. Do I need to have both MIDI in and out connected? I only have one cable so I went MIDI out of the P80 into MIDI in with The US-224. I get a blink on the Tascam when I turn the Yamaha on, but it doesn't light up when I play any notes. I have the host select set to MIDI. I think I need to get this right before I even try getting the Cubase reading the signal. Which it already is selected to MIDI to with the control surface of the US-224. Please help.