Ubuntu 13.04 - Sound Not Working [solution]

* Update: if you have tried this solution and the sound keeps stopping working, then try the very last statement: sudo alsa force-reload 
I am still yet to figure out why.

Even from a newly installed version of ubuntu, you may start it one day and the sound surprisingly may not work! So here is a solution I went through - that didn't work - which may work for you:

http://www.tutonics.com/2012/10/fix-no-sound-turn-off-auto-mute-in.html#.UY2TDUAW2lj

Then the solution which worked was to remove and reinstall alsa-base and pulseaudio:

Firstly remove the two drivers:

$ sudo apt-get remove --purge alsa-base pulseaudio

Secondly,  reinstall them:

$ sudo apt-get install alsa-base pulseaudio

Finally, force them to reload:

$ sudo alsa force-reload

Props go to the site which provided the solution for me:

http://linuxg.net/how-to-fix-the-no-sound-error-after-upgrading-to-ubuntu-13-04/

Hope this helped anyone who had the problem!