This is the easiest answer. I tried to get audio into a Guacamole VM years ago. USB adapter was the easy win. Never actually found the resource number for anything close to what i wanted.

I hadn't even considered that as a solution, and I've literally just bought a usb to 3.5mm for my main PC.

Thanks for the idea, I'll purchase another cable.

I have a bloody drawer FULL of cables because I do stuff like this. To the point where I'm wondering if the meaning of life for a human male is to collect as many cables for various devices as possible before you die lol.

Thanks for this, it totally worked although I'm not quite satisfied with the audio quality. There's artifacts in the sound stream, like a clicking, and Ozzy sounds a little strange when I play Bark At The Moon.

But all in all it's better than no audio, so thank you.

I of course tried to pass through the audio device again, don't wanna have to spend money if I don't have to, but it crashed Proxmox again so it was straight to Amazon.