Almost any keyboard which has MIDI output (looks like 2 circles with several prong holes) can use our program. The MIDI cable is plugged into the keyboard with the 2 connectors and the other end plugs into the USB port of the computer.(A USB cord with USB connectors on both ends doesn't work.) However if the Casio 720 is used with a Mac computer or a 64 bit operating system then it will not work as this Casio model doesn't support the technology.