Hi Andrea. I've been checking your problem, and found some things you can try (in order). Let's hope any of them turns out to be of help:
- You said that you're always using software audio, try hardware instead and see if that helps (quite unlikely, but would be nice if you tested)
- Search for 'libvorbis.dll' in your Windows system folders, to see if the game could be using some other version of the file you had installed previously. If you find any copy, rename it to 'libvorbis.old' (just so that you can restore it afterwards) and restart the game. If this doesn't work, or if you didn't find any other copy of the file, replace the 'libvorbis.dll' file in the redist folder with the one in the attachment. Start the game after that.
- If none of the above worked, try changing the UseThreading="true" parameter to UseThreading="false" in the settings.cfg that can be found in the same folder where the 'hpl.log' is.
Please tell us if this worked or not
(hopefully it does)