Re-enabling sound (checkbox "Enable Audio") after unchecking it doesn't work, there's no music. UI sounds work. This is while in the geoscape.
If re-enabling happens during a tactical mission, the game crashes.
Even in the first case, the program suspiciously freezes for a second or two.
console output:
...
------- sound initialization -------
SDL_mixer version: 1.2.11
... requested audio rate: 44100
... driver: 'pulse'
... audio rate: 44100
... audio channels: 2
... loaded ogg vorbis support
Error: Received signal 11.