You got a great deal on your QY 10 purchase but perhaps mislead by your midi interface cable salesman. If your computer has a sound card you should be able to plug the midi cables into it. Otherwise you will need to consider getting a conversion box such as a Portman which allows the use of your serial or parallel port. at least you have a manual! I amwaiting until tax time to see if I have enough money to buy a new PC with a sound card before I spring for an interface box($80). Post here if you have more questions