According to the tests i did inside Nuendo 8.3.20, Midi CC output is not working for VST plugins.
Seems to be related to the 64 bits version of Cubase / Nuendo. This was working with 32 bits versions, according to this thread :
Is it the same for Nuendo 10.1 ?
how to reproduce :
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Use a VST plugin with Midi output, for example DP meter pro. Then activate a midi output in the plugin, for example RMS level.
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Create a midi track
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Select the plugin midi output as the midi input for this track.
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Put the track in record mode
result : no midi signal is entering the midi track as it should be.
VST plugins with MIDI outputs are quite rare, but this capability can be very useful, for example to send a level metering on a control surface LED strip or as an input for a VST compressor midi control.
I did try that in another 64 bits DAW where it’s working.
Did i miss something or is there a bug here inside Cubase / Nuendo not fixed since a long time ?