How to let an application running on the hosts machine accept audio from another participant?

[HPB]

We run training workshops on Zoom where the host has an application that runs on their MacBook. We need participants to talk to this application through the Zoom meeting. Is there a way to direct participant audio to the application running on the hosts machine? 

[bstrelko]

It sounds like you need to take the Audio output from Zoom and pipe it into the other application. You have not explicitly expressed a need to get audio back from that application into Zoom, so I'll assume that isn't a requirement here.

On MacOS, you can download VB-CABLE (https://vb-audio.com/Cable/) which will allow you to route an output signal to a virtual input for other applications. If you do not need to hear the output from Zoom, just get it into the other application, this is the only solution you need. Simply Route the output from Zoom to VB-Cable-Input and select VB-Cable-Output as the input for your application.

IF you also need to hear the signal from Zoom out loud on the Mac while sending it to the application, you'll want to use the MacOS Audio MIDI Settings utility to build what's considered a 'multi-output device'. That device will consist of a.) the Mac's local output you wish to monitor the sound on and b.) VB-CABLE-Input. You'll then select this new multi-output device as the output in Zoom.

There are a number of videos/articles on this floating about, just do some Googling and try to learn a bit more about some of the applications and terms above - shouldn't be too much of a lift.