I’m on Windows and using a RME Fireface UFX+ interface and RMEs TotalMixFX software to route audio. Just route your signals you want to send to zoom (main out Nuendo, Talkback, etc…) to a bus, which then is selected as your input device in Windows sound preferences. Zoom, Skype, Slack, etc… are using the standard Windows input here on my machine. Easy as that. Should work similar with every other audio interface.
You can also create different outputs directly in Nuendo and work for e.g. with direct routing to route your signals to a specific bus on your audio interface. Then choose this bus as the input source in zoom.
Where is that other thread? I recall seeing some images in it or a link to that video. I use Voicemeeter and it works for me with a MOTU 16A. I have to switch the driver in Nuendo to VM unfortunately but at least that way I can get everything going in Zoom using a virtual cable.
The above screencaps are a bit “old”, and I think that one problem I ran into occasionally was that I wouldn’t get audio out of Nuendo if I had a VM output selected twice - in my case in Control Room and in the Outputs tab. So I picked one or the other and then it worked.
(Not all of the added red lines are applicable to your case, just to mine)
Just use the Cue sends to send audio to Zoom, and pull the Zoom back in trough an input channel on which you enable the monitoring button.
That way, the client can speak to everyone, you can send whatever you want, including talkback to the client.
P.S. They’re not exactly obvious, but Docs do install with ASIO Link Pro.
Tap your Windows Start Icon, look under A for ASIO Link Pro, the PDF is there.
For reference, it’s kept in:
“%SYSTEMDRIVE%\Program Files (x86)\ASIOLinkPro”