Cubase 10.5 - Use Cthulhu with Serum

Hi everyone! I want to play Serum and use the Cthulhu chords and arp. This is how I have it set, but I can’t get it working. I would assume I could play Cthulhu and have it’s output sending to the Midi in of the Serum. I used rack instruments for both. Anyone have experience with this? What is the missing ingredient? (The top image is the Serum channel settings)

OK, I solved it. The midi needs to be on the Cthulhu channel and the Serum channel needs to have the monitor turned on. See image below.