C2MIDI Pro vs Roland UM-ONE mk2
Real-world performance. Real differences.
Welcome to a quick comparison of two premium USB to MIDI solutions. Short on time? Perfect! Let’s get straight to what matters. Before the specs, here’s how they perform in real setups.
Scenario 1: Connecting your synth to your laptop
Roland UM-ONE mk2
- Plug into USB
- Connect MIDI
- It works
✔ Reliable
✔ Simple
CME C2MIDI Pro
- Same setup
- Same simplicity
- Plus: filtering, mapping, routing if needed
👉 In this scenario, both work.
But only one gives you control when things get complex...
Scenario 2: You want to remove your laptop
Roland UM-ONE mk2
- Doesn’t work
- Requires a computer
CME C2MIDI Pro
- Connect MIDI OUT → MIDI IN
- Powered via your device or externally via USB-C
- Fully operational
👉 This is where the difference becomes real.
Scenario 3: Your MIDI setup gets messy
Think:
- Unwanted CC messages
- MIDI clock conflicts
- Devices not behaving as expected
Roland UM-ONE mk2
Passes everything through. You really need to solve this elsewhere...
CME C2MIDI Pro
- Filter it
- Remap it
With CME's C2MIDI Pro you fix it with the cable. Program it with UxMIDI Tools and switch between two presets on the fly via MIDI messages.
👉 This is where the difference becomes big.
Scenario 4: Modern vs legacy setups
Roland UM-ONE mk2
- USB-A
- Built for traditional computer setups
CME C2MIDI Pro
- USB-C
- Works with laptops, tablets, phones, hybrid rigs
👉 Built for how musicians work today.
Scenario 5: Price vs value
C2MIDI Pro → US$ 29.99
Roland UM-ONE mk2 → US$ 49.99
👉 You’re not paying more for innovation
👉 You’re getting more functionality for less
Take a look at the comparison chart to see how the CME C2MIDI Pro delivers more, for less.
Header | CME C2MIDI Pro | Roland UM-ONE mk2 |
|---|---|---|
Concept | Dual-purpose smart MIDI cable | Basic USB MIDI cable |
Function | Interface + filter + mapper + router | Interface only |
Standalone use | ✅ Yes | ❌ No |
MIDI control | Full (router, filter, mapper) | None |
SysEx handling | Unlimited size | Unlimited size |
Connectivity | USB-C | USB-A |
Compatibility | Class-compliant | Class-compliant |
Power | MIDI + USB | USB |
MIDI Channels | 16 | 16 |
Price | US$ 29.99 | US$ 49.99 |
The honest takeaway
The Roland UM-ONE mk2 is a solid, reliable classic. If all you need is a basic connection, it delivers.
But the C2MIDI Pro exists because musicians needed more:
- More flexibility
- More control
- More independence from computers
And most importantly:
👉 A solution that grows with your setup, adapts to your workflow, and supports your creativity every step of the way.
Read on to discover the community-driven story behind the C2MIDI Pro - along with insights from real people using CME products.
Have feedback or ideas? Share them below: your input might shape what we build next.
Built Together with the CME Community
At CME, we don’t start with products. We start with conversations. After launching the U6MIDI Pro, one question kept coming back:
👉 “Can you make a simple USB to MIDI cable, but done right?”
That question led to the U2MIDI Pro.
A straightforward USB-A to MIDI solution, but with something extra:
built-in routing, filtering, and mapping via UxMIDI Tools.
Not just a cable, but a smarter way to manage your MIDI signal.
Then the next step felt obvious… or did it?
As setups evolved, so did your expectations:
👉 “Can we get this with USB-C?”
We could have just swapped the connector.
USB-A → USB-C. Done.
But if you know CME, you know that’s not how we work....
We don’t just update. We rethink.
Together with the community, we asked:
What could this become if we really pushed it further?
What if a MIDI cable didn’t just connect devices…
but actually improved how they work together?
The moment it clicked
We noticed something interesting.
Some of you were already using the U2MIDI Pro in creative ways:
- Routing MIDI from input to output
- Powering it via USB
- Turning it into a smart MIDI cable
That wasn’t the original idea. And it revealed something bigger!
That insight became the C2MIDI Pro
The C2MIDI Pro is not just a USB-C version.
👉 A cable that doesn’t just connect
👉 A cable that actively improves your MIDI flow
- USB-C to MIDI interface
- Full routing, filtering, and mapping
- And something entirely new…
A true standalone smart MIDI cable
Unlike traditional interfaces, the C2MIDI Pro powers itself directly from your MIDI hardware.
- No computer.
- No external power.
Just connect:
👉 MIDI → MIDI
👉 And it works
This makes it a dual-purpose solution:
- USB-C ↔ MIDI interface
- MIDI ↔ MIDI smart cable
Powered by Your MIDI Device
Our experience with MIDI-powered devices comes from WIDI Master.
👉 If your device can power a WIDI Master, it can power a C2MIDI Pro.
We maintain an open, community-driven compatibility list with 900+ tested devices.
And if your device doesn’t provide enough power:
👉 Simply use a USB power adapter or power bank
👉 It will always work
