Case ID: #4563 Log Date: JAN 2025

Connection problems with USB MIDI controller – Solved 

Panic Index // FRUSTRATED
Technical Depth // HARDWARE
RESOLVED
Target Environment
Windows + Cubase
Reported Symptom
“New Donner DMK-25 controller was not detected by Windows or Cubase, despite being powered on.”

Hi Paul. I have bought a Donner DMK-25 MIDI controller, but it doesn’t work in Cubase. Can you help me? Robbie

Paul Andrews of Audio Support explains how he helped his client solve this issue:

I recently received this question from Robbie, an electronic music producer living in Spain. By email, we arranged a time for a remote support session where we could speak via WhatsApp voice chat and I would remotely connect to Robbie’s PC and diagnose the problem.

Once the session had started and Robbie and I were connected, he explained the problem in more detail. 

His Donner DMK-25 was connected to his PC via USB and the lights on the keyboard were active.

When he pressed the keys on the controller, no instruments were sounding in Cubase.

I started by checking the MIDI Devices panel in Cubase’s settings. I could see Robbie’s Digital Piano as an active MIDI device, but not the DMK. This indicated the problem was outside Cubase.

I went to Window’s Device Manager and couldn’t see the DMK as being connected to Robbie’s PC at all. We needed to have the controller recognised by Windows before we could use it in Cubase.

I asked Robbie to unplug and reconnect the USB cable from both the back of the PC tower and also from the controller itself. Neither change caused the DMK to be recognised by Device Manager.

I checked on Donner’s website to see if there were any drivers required for this unit to work with Windows, but was unsurprised to find it was a standard Class-Compliant device. With a basic MIDI controller such as this, it was unlikely that Windows was the problem.

I asked Robbie to do a visual inspection of the USB ports and the USB cable and see if he could spot any damage or something small like a bent pin. 

At this point, Robbie mentioned to me that the USB cable he was using was not the one that had come packaged with the DMK. He had used a different one from his studio, as it was slightly longer. I asked Robbie if he still had the original cable and he was able to locate it in his studio.

Once we had swapped the USB cables, we were pleased to see the DMK25 appear as an active device under Sound, Video and Game Controllers in Device Manager.

We checked in Cubase and could now see MIDI being sent from the DMK in Cubase’s MIDI input monitor and Robbie’s VST instruments were sounding as expected.

Robbie was pleased that he now had his new MIDI controller working. The most likely reason the longer USB-C cable didn’t work is that it was designed for charging mobile phones only. Mostly these charging-only cables have a sticker or tag on them, but not always.

Now that the MIDI was working, Robbie asked if it was possible to use the rest of our remote support hour to assign the transport controls of the DMK to control Cubase.

If you need help diagnosing problems with MIDI controllers, Cubase or any other aspect of music technology, please get in touch.

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Laura Forrest-Hay
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Paul reinstalled all my lost sample libraries, streamlined the storage on my computer so it works faster and fixed my corrupted disk. it took us a couple of sessions and he was friendly and patient throughout. He never made me feel stupid and never over-explained stuff I already knew - in fact he boosted my confidence. Would highly recommend. I've put him on speed dial!
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MrMattkitt
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Paul was brilliant, listened to the issues I had on Cubase and my home studio, worked methodically through potential problems and sorted everything. Amazing service, down to earth and explained everything so I could understand. I am a very happy song writer once again thanks to Paul! Will be using Paul again in the future and highly recommend. Thanks Paul.
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Ciarán Hanna
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Honestly, if you're in any way stuck in a creative block because of the gear you have, you've more questions than answers about what the best setup should be for your flow, or even if you have very nuanced problems in your DAW/with your gear, the service Paul provides is second to none. Besides being an extremely nice guy, he knows his stuff and takes the time to understand what you want to get out of each session and makes sure all is good to go! Can't recommend him enough!
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Trudie Brogan
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Really great service. Paul is so knowledgeable and I learned so much. Totally recommend.
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Cottin Ulysse
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Paul was fantastic, he solved my problem in less than 30mn, and he is a lovely guy. I really recommend him.
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Justin Bikram
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Paul provided as stellar service, worth every penny. I came to him with a genuine issue that was affecting my Logic Pro 11 album project regarding drums and midi maps and he solved my problem most efficiently. He was patient, courteous, quick thinking and highly knowledgeable. I will certainly consider using the service again and thoroughly recommend Audio Support - Thank you Paul - you are a star :)
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josh fulford
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Working in Reaper. Super knowledgeable, friendly, speaks in easy to understand terms. Paul is helping us DAW newbies get in the game. Paul got my lost plugin files working again as well as showed me how to find missing wave files for projects that were loading incorrectly. Keep this man on speed dial.
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Richard Grant
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Paul fixed in around half an hour some midi keyboard/controller problems I have been trying to solve but have had to live with for around two years! He is very knowledgeable and patient and the Any Desk link worked perfectly. I wish I had found his website sooner and wouldn't hesitate to call on his services again. Rick Grant
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Paul B
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Paul was excellent in helping me diagnose and resolve a problem I had on Logic Pro 12 file issues
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William Schrul
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Paul really helped get my Cubase up and running again. He really knows his stuff, and I'll definitely look him up again when I'm stuck. Thanks!!!

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