Well there are few things you can try. Edit the profile you are using and remove audio rate and channels (or set channels to 6). You can also try a different audio codec like mpga instead of mp3. You can also test opening the stream locally with VLC and check if it outputs sound. Just select the profile from the dropdown list and once the video opens, click on the open in external player button and open the playlist with VLC. If all fails, mail me instructions to download such a file and I can take a look.