Hey guys. My Roland VGA3 has a MIDI output, like the Line 6 gear. I assumed that if I plugged my midi output into my laptop, the amp would play through the speakers that the laptop are hooked up to. My laptop has a port for output (speaker system I have) and an input for microphones. I assumed I would have to plug the amp into the microphone input, I have the right cable adapter. When I do this, I hear nothing. Am I missing another piece of equipment? Do I need a special program? Thanks for any help.