I am writing below what I was advised by tech support and worked for me.
The problem is the new Windows MIDI driver that does not allow the DAW to see the virtual MIDI ports generated by Allen & Heath’s MIDI Control app.
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We have seen reports of MIDI control breaking on Windows 11. This is from a service pack update that Microsoft has rolled out. More info in the article below.
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We have found a temporary workaround by typing a couple of prompts in to Windows terminal. However, this must be actioned every time that the computer is booted.
- Open Windows Terminal as an Administrator (“run as administrator”)
- Type “net stop midisrv”
- After that completes, type “net start midisrv”
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Also, there is a strict order in which this needs to be actioned. Please follow the steps below.
- Allen & Heath Midi Control needs to be running
- Midi service needs to be running
- Midi service needs to be stopped
- Midi service needs to be started - this seems to allow midi service to enumerate virtual ports provided by the Allen & Heath Midi Control app
- Allen & Heath Midi Control needs to be stopped
- Allen & Heath Midi Control needs to be started - this seems to be necessary to restore MIDI data transfer from the QU-5 (in my case)
- Launch Cubase (in my case)
- Load or create multitrack session
- DAW control works bidirectionally between Cubase and QU-5 (in my case)
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Hope this will be useful to someone.