This is something I can’t test right now as I don’t have a multi out sound card. But after exporting the plugin and loading it in Reaper it works just fine. My office colleague does have a nice RME interface that I will test with, but I’m away from work for another week, so I won’t be able to check until the end of April. You mentioned on the Csound list that you are having issue with Cubase. You might take a loo at this thread…