So, I have a keyboard, and on the end it has a MIDI-OUT. I bought a cable that go's from MIDI to USB. I plugged in the USB, and on the other end I had 2 midi cables. 1 Input and the other Output. So I have tried to plug in the input in the output, or the output in the output, and pressed the MIDI button on my keyboard, until it said OUT, and tried to play on my keyboard, but Logic Pro X/Garageband did not do anything. The programs did however say "1 midi input detected." Could it be because my keyboard only take's one cable? If so, why would it only have output and not input?