rightclick > Options > Preferences > Audio
Is "System default" selected for both "AC3 decoding" and "Output device".
If not: try if audio still missing when "system default" selected
(If not already done perhaps install
AC3 filter.)
Further " image is totally distorted (CVD-DVDrip)." What video-type is that (you can find out using e.g. GSpot; the second item of my Help-to-Help post has a link where to download).