When the computer switch is set to MIDI:
In this mode, the MIDI IN and OUT connectors work the same as they would on any
MIDI instrument. To use it with a computer, a MIDI interface is required. The
computer connection is inactive in this mode.
When the computer switch is set to PC-2 or Mac:
In this mode, the device acts as it's own interface and can be connected
directly to a serial port on a computer. The MIDI OUT connector is disabled but
the MIDI IN connector is still active.
In this mode, the MIDI IN and OUT connectors work the same as they would on any
MIDI instrument. To use it with a computer, a MIDI interface is required. The
computer connection is inactive in this mode.
When the computer switch is set to PC-2 or Mac:
In this mode, the device acts as it's own interface and can be connected
directly to a serial port on a computer. The MIDI OUT connector is disabled but
the MIDI IN connector is still active.