Roland UM-ONE mk2 USB MIDI Interface

90 out of 100. Incorporating 3150+ ratings and reviews.

Gearank High Notes

Roland UM-ONE mk2: Highest Rated MIDI Interface - 2017.04

Gearank Recommendation

The UM-ONE mk2 appeared on the very first edition of our recommended list for MIDI Interfaces in April 2017 where it remained until September 2022 when it was out-ranked by other interfaces.

Although this was previously on our recommended list, there are now options with higher ratings in our guide to The Best MIDI Interfaces


The Roland UM-ONE mk2 is a compact and affordable USB MIDI interface that has low latency timing.

It comes in a form of a “Y” cable. It has data indicators for its MIDI ports and has conveniently integrated USB and MIDI cables.

There’s a small switch on the side labelled “COMP/TAB” that allows you to set it to use the supplied “old school” Windows/Mac drivers (“COMP”) or the more modern “Class Compliant” Mode (“TAB”) that doesn’t need drivers so it also works with IOS (iPad 2 and later, via Apple’s CCK/lightning connector), Linux and newer Android devices.

Just one thing to keep in mind with iPad compatibility is that the manual states that you need to connect it through a powered USB hub, presumably because it may use more power than iOS provides. However Roland says it’s compatible without needing extra power and users have reported that it works connected straight into the Apple adapter as well.


  • Number of MIDI Ports: 1 MIDI In, 1 MIDI Out
  • Compatibility: Driver Mode available for Windows/Mac, Class Compliant Mode : Compatible with Windows, Mac, Linux and iPad 2 or later (via CCK/lightning connector)
  • Power Supply:USB. May need powered USB hub for iPad/IOS connection
  • Size: 2.38″ (W) x 1.19″ (D) x 0.56″ (H)
  • Weight: 4 oz.