MainStage: Connect a USB music keyboard
You can connect a USB music keyboard to your computer to play software instrument patches or to use with external MIDI devices such as synthesizers or sound modules.
Connect a USB music keyboard to your computer
If the keyboard has a USB port: Connect the USB cable from the keyboard to your computer.
Be sure to follow the instructions that came with the keyboard, which may include installing the correct driver on your computer. Check the manufacturer’s website for the latest driver software. If you are using a MIDI interface, be sure to follow the instructions that came with the interface.