After upgrading to the latest version of VirtualBox for Mac, with a Windows 7 as the client, I have struggled to get audio working with a USB audio device.
I have a Presonus Studio192 device, and it’s a fantastic piece of kit, but in the current setup, VB doesn’t want to play nice.
I am running Mojave on a 4,1->5,1.
The way around this problem with the audio not working is quite simple.
Download VoiceMeeter Banana and a program called VBAN Receptor from the Apple App store, and you should be right to go.
It’s basically and IP Audio Codec where you can route streams of the audio to different IP addresses. Rather impressive.
Set up the outgoing streams to the computer it should go to.
This costs about $10 Australian.