USB MIDI Interface


The UM-3EX is the most innovative mid-sized MIDI interface on the market. The expandable design of the UM-3EX makes it the ideal MIDI interface for the small studio, but allows you to daisy-chain up to three units together for a total of nine MIDI inputs and outputs. The UM-3EX can be mounted into the RAF-70, a rackmount kit, making for a clean, expandable studio installation. The UM-3EX allows you to select between MIDI Out and MIDI Thru for each output port. The UM-3EX uses FPT (Fast Processing Technology) to ensure low-latency, low-jitter MIDI transmission, even with three devices daisy-chained together.

THRU switch 1
THRU switch 2
THRU switch 3
MODE switch
UNIT switch
MIDI IN Connector x 3 (16 MIDI Channels x 3)
MIDI OUT/THRU Connector x 3 (16 MIDI Channels x 3)
USB Cable
USB Connector (TO UM-3EX) x2
Power Supply
Supplied from the computer
Current Draw
98 mA
Owner's Manual
Size and Weight
138 mm
5-7/16 inches
67 mm
2-11/16 inches
42 mm
1-11/16 inches
0.2 kg
0 lbs. 8 oz.
*The specifications are subject to change without notice.


Updates & Drivers


If you have questions about operating your Roland product, please check our Knowledge Base for answers to the most common questions.
You can also contact our Product Support department by phone or email.
In addition, we have a library of Owner’s Manuals and Support Documents that you can download and reference.

Owner’s Manuals