I would like to be able to add more than one input into the VM, and be able to pick from more than one output on the VM.
Sure - use a multichannel USB-audio-device like those listed here:
https://www.thomann.de/de/usb_audio_interfaces.html
Ulli
Well, I was thinking more like, multiple sound cards. Right now in Fusion it looks like I can only have one sound card for input and output. With an app like Loopback, I can create multiple purely virtual audio devices. I would like to be able to route multiple of them into a Fusion VM.