Midi Pass Through doesn’t seem to work when using the VST3 version so I can’t use control surface cc mappings.
It works fine using the VST2 version.
I’ve tested this using several plugins (Diva, Serum, Kontakt Player) and got the same result.
I’m using Scaler v2.06 (same issue in 2.05)
Reaper v6.11 64 bit (this is the latest version)
Windows 10 64 bit with all the latest updates.
Brilliant product - only had it a few days and can see massive potential for use!