Transmitting Midi Messages From A Midi Keyboard Or Other Device To A Midi Sound Module - Roland UM-3EX Owner's Manual

Transmitting MIDI messages from a MIDI Keyboard or other device
to a MIDI sound module
If you want to play a MIDI keyboard and send MIDI messages to a MIDI sound module, make the
connections and settings shown below.
There is no need to connect the UM-3EX to a computer.
fig.connect-thru-e.eps_60
MIDI device setting
Since no computer is used, there is no need to make MIDI device settings.
THRU switch setting
Turn the THRU switch on.
MIDI messages from the MIDI keyboard or digital piano connected to the UM-3EX's MIDI IN
connector will be sent to the MIDI sound module connected to the UM-3EX's MIDI OUT/THRU
connector. Even if the UM-3EX is connected to a computer, no MIDI messages will be sent to the
computer.
* Don't change the setting of a THRU switch while playback is in progress. Doing so will cause MIDI errors.
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THRU ON
MIDI Message Flow
Connect to the MIDI IN connector
of the MIDI sound module.
MIDI Sound Module
MIDI Keyboard
Connect to the MIDI OUT
connector of the MIDI keyboard.