I've tried it now, and sadly this is not the case. There also appears to be a very annoying two-second delay between using the soundlevel-controller and the lev

I've tried it now, and sadly this is not the case. There also appears to be a very annoying two-second delay between using the soundlevel-controller and the level of the sound actually changing. I would love to see both of these things resolved in a release in a not too distant future. If you happen to have had certain reasons for not making an auto-hiding UI by default, please provide it as an option instead.