In Little Big Adventure I have a music in cutscenes, but not in the game. In Diablo I don't have the music even in cutscenes. In the game I can hear the music for one second, then it stops. In Diablo I also don't have the speeches (when I'm talking to someone, I can't hear the voice, I can only read subtitles), but in Little Big Adventure the speeches works good and I can hear them clearly. The sound works great in both games. I tried to change this line:

to this:

But it didn't help. What can I do?
Also, is there any way to make the 3d games, like Silent Hill, more playable? They are very laggy, while 2D games work perfectly.