The GI-20 normally requires that a Roland USB driver be installed on your computer to be able to communicate correctly. If you have an operating system that is not supported, you can set the GI-20 to use the MIDI driver that is built into your computer's operating system (for instance, Core MIDI on macOS). To do this you must change the USB Driver setting to "Generic."
Here are the steps:
- Turn off the power to the GI-20.
- Hold down [WRITE] and turn on the power.
- Press [SELECT], causing only the leftmost indicator of the display to light up.
- Press [PATCH/VALUE] to select “GE” (GENERIC).
- Turn the power off.
The USB driver setting becomes effective the next time you turn on the GI-20.