All outputs selected, unable to select desired.
Has happened to me as well… I ended up selected through the Sound menu in settings.
This is a known issue upstream:
https://github.com/budgie-desktop/budgie-desktop/issues/1102
It is kind of difficult one to resolve because none of the current developers have such hardware that causes this issue - more often than not, to provide a fix we have to reproduce it first. We do encourage people to help here to look at the code and provide a fix. More than happy to point people where in the code-base to look.
I had the problem once or twice, had to go directly in the Sound Settings, but the problem never came back… I will pay attention