Thank you for the prompt response.
Yes that makes very much sense, I was not aware of this filtering of CC messages and thus such an “emulation” feature looked strange.
Now that I have looked at the documentation it is clearer now, and also it seems that this is not really just a Cubase thing, but more a limitation of the whole VST3 format. Can you confirm that?
Also, does the VST3 format prevent Program Change messages from being sent to plug-ins as well?
From what I could understand of the VST3 documentation, it seems that only Note messages are intended to be passed by the host to the VST3 plug-in “natively” (i.e. not resorting to workarounds like the CC emulation in JUCE).
Is it really so?