Hi ,
First my apologizes , I forgot that you gave me some hints on your acknowledgement message
My BIAB 2022 version is Build 927 , and my VTSi plugin version is 4.8.13 (64 bits)
This is example of the issue (new Reaper project with only BIAB and RealControlMIDI) : only control messages for channel 8 are sent ( soloist track ...) when hitting Play or Sync into the BIAB plugin GUI
Others channels contains only Note On / Note Off messages
Btw , changing the channel for the working track (Soloist) sends control messages on the new selected channel as expected (for example channel 9 instead of 8)
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