May want to try driving AD2 directly from JS4. Add both synths to a project Enable MIDI Output in VST2 drop down above the JS4 UI - red box in the image below Set the MIDI input for AD2 to JS4 In the JS4 UI load the kit "MIDI Out Template" under "@ Special Kits"  - 1 in image below load "Addictive Drums 2" - 2 in image below Remove unneeded kit pieces (optional) Enable input echo for both synths
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