Virtual Audio Cables (VAC) Running on Microsoft Windows XP, Vista, or Windows 7
Other than the operating system, this is the only program that must be purchased. The trial version might be used to get familiar with the program, but it is not usable on the air. With out this program you would have to use your built in sound card and external cables which can pick up RF signals. It is a much cleaner installation to use this program. Cost US$39.99. Go to this website to purchase and download.