I am running Hardy Heron. Somehow the audio and video features on my system have become corrupted since attempting to install the VLC media player.
The VLC player works but without the sound. Unfortunately there are other side effects.
Totem only plays the introduction part of a DVD and never gets to the main content. The CD player likewise plays audio CDs but without the sound.
The sound still works with other applications (e.g. Flash and RealPlayer - both with MP3s and with internet radio). WMV and AVI files also work in both Totem an VLC players without the sound (I can play these files with MPlayer with the Sound.)
Prior to installing VLC player I had enabled the Intrepid Medibuntu repository by mistake.I may have downloaded an unwanted file that is still lurking in the background. Uninstalling and reinstalling VLC, Totem etc is not helping (it has made Totem worse in fact).