Roland EDIROL UM-3EX Mode D'emploi page 13

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UNIT number select switch
Specifies the UNIT number (p. 42) of the UM-3EX.
If you're connecting multiple UM-3EX units, you must set each unit's UNIT number select switch
appropriately. Set each UM-3EX to a different UNIT number.
* Don't change the setting of the UNIT number select switch while the UM-3EX is connected to your
computer. First, you need to disconnect the UM-3EX from your computer. Then, once you've changed the
switch setting, you can reconnect it.
* Connection of multiple units is supported only in Windows XP and Mac OS X. For details, refer to
"Connecting multiple UM-3EX units" (p. 42).
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UM-3EX connectors
Use these when connecting multiple UM-3EX units.
* Do not connect any device other than a UM-3EX to the UM-3EX connector. Doing so may cause the UM-
3EX to malfunction.
* Connection of multiple units is supported only in Windows XP and Mac OS X. For details, refer to
"Connecting multiple UM-3EX units" (p. 42).
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