P&o USB MIDI Cable Converter PC to Music Keyboard Adapter Latest version with a built-in driver LED indicate MIDI in signal and MIDI out signal Plug the USB cable into any free USB socket on your computer Open your music software program, e.g. Cubase, Sonar, MIDI Connections, etc To save potential problems, it is recommended that this interface is always connected to the same USB as it was originally installed on to prevent multiple installations of the driver