I don't have sound on Ubuntu studio

[Douglas Pollard]

Hi all, I could use a little help here. I am trying to do video on 
Kdenlive and  I don't have sound. I am using ubuntu studioI have been 
doing things I did not need sound for so it may have been several 
weeks??   I don't have any sound not even when playing a cd or DVD 
video.  I have an ASUS  mother board with a built in sound card. The 
computer is dual boot Hewlett Packard with xp and Ubuntu 10.10 as well 
as Genome and kde desktops. I have not had sound since installing ubuntu 
studio 10 10 and updated from 10.4  I think that is when I lost sound. 
If anyone needs more info to help me please advise and I will try to get 
it for you.   Thanks Doug