Roland UM-4 Owner's Manual page 20

Installing & Setup the Driver
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In Multimedia Properties, click the [MIDI] tab. Then, with [Single instrument] selected for
MIDI output, click the MIDI device that corresponds to the MIDI port to which your MIDI
equipment is connected via [Roland UM-4 MIDI 1] through [Roland UM-4 MIDI 4].
fig.03-10.e.eps_50
MIDI devices correspond to MIDI ports as follows.
MIDI Output Device
Roland UM-4 MIDI 1
Roland UM-4 MIDI 2
Roland UM-4 MIDI 3
Roland UM-4 MIDI 4
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Click [OK].
This completes driver settings.
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MIDI Output Port
MIDI OUT 1
MIDI OUT 2
MIDI OUT 3
MIDI OUT 4