Using Zoom (or in fact, any other video conferencing solution) together with vMix is not completely trivial. In this post I am going to explain how I do this with a single PC.
Of course one could use the built-in vMix Calls, which already handles a lot of things like N-1 audio routing, but there are quite some limitations.
You need the following software installed and running on your vMix machine:
If you want to talk to your guests before you put them on air, remove their audio from the master bus and put them on your headphones using the “S” button. Create a new microphone input with your own microphone and assign it only to the return feed audio bus. Keep in mind to assign the guests back to the master bus and remove your microphone from the return bus before putting them on air.
It is recommended to keep the Zoom client on a dedicated screen.