Roland UM-4 Owner's Manual page 26

Installing & Setup the Driver
5
After the search has been completed, make sure that "Roland UM-4" is listed in the "OMS
Driver Setup" dialog box, and click [OK].
fig.03-omsu5.e
6
After making sure that the UM-4 is listed in the "OMS MIDI Device Setup" dialog box, click
each check box for Port1 through Port4 to check them all, and click [OK].
fig.03-omsu6.e
26