Skype Audio not working on Ubuntu

If you are having audio problems while using Skype on Ubuntu, first check to ensure that sound is working on your system and that your microphone and speaker volume levels are high enough. If you cannot hear yourself using the Skype Echo Sound Test, its possible that pavucontrol is not installed on your system. To install it, use the command :

sudo apt-get install pavucontrol

Restart Skype. Now the audio should work fine.