If connected to USB, this will be the MIDI devices USB Port listing, if it is connected to an interface that in turn connects to your computer, then it will list the interfaces MIDI in port. The Receive From port is the method of delivery that StudioOne uses to receive the MIDI signals from your MIDI device. Set up a New Keyboard to Receive From your Midi Device MIDI In Port. You may want to choose this setting if the predefined setting is giving you trouble as well. If your device is not listed, please select the ' New Keyboard' selection at the top to send MIDI triggering to the StudioOne software.
There are some predefined listings for certain devices that will show up on the left hand side for easy connections should you have one of these devices, select the device in the list on the left. This will open the window to set up the MIDI device.
Open the StudioOne software and select the Configure External Devices link in the Setup area on the Start Page. Video Link: PreSonus 101: MIDI Device Setup in Studio One