Alexandre Dey just added some really great updates to his LXD ContainerBox tool so I thought
I’d let others know about it!
It now works with LXD installed via APT or SNAP
He also changed the audio support to utilizing the new LXD Proxy Device capability.
I just downloaded it and tried it out and it works really well.
After you use it to create & start a container you can add your own userID/account to the container and then log in as your userID.