Game Port Midi Installation: Plug Game Port Connector into the Game Port receiver located on the back of your sound card. Make sure that all of the latest sound card drivers have been installed on your computer. If they have not been installed, refer to your sound card installation manual for instruction. Single Port Midi Devices: In the back of your music keyboard locate the Midi Out port and plug the Midi Connector into the slot. Make sure that the cable marked "TO MIDI OUT" is plugged into this slot. Double Port Midi Devices: Locate Midi cable ports on the back of your music keyboard. Plug the Midi Connectors into their appropriate slot. Make sure that the cable marked "TO MIDI OUT" is plugged into the OUT slot and the cable marked "TO MIDI IN" is plugged into the IN slot.