I don't know why, but after updating ALL of my playlists, all chants are working as it is supposed to be. I have never changed the directory of the chants or playlists. I used chants from this thread and some others and both had the problem, that they were very silent ingame. The day before yesterday I spend 2 hours in creating my plalists again because I can't say why the playlists took a wrong path, which you can see when you open the playlist with the editor. But it simply worked. Maybe that was the problem in general.