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Ubuntu usually detects the audio hardware of the system automatically during installation. The audio in Ubuntu is provided by a sound server named PulseAudio. The audio preferences are easily configurable with the help of a very easy to use \gls{GUI} which comes preinstalled with Ubuntu. \subsection{Volume icon and Sound Preferences} \index{sound!volume} A volume icon, sitting on the top right corner of the screen, provides quick access to a number of audio related functions. When you left-click on the volume icon you are greeted with four options: A mute option at the very top, a slider button which you can move horizontally to increase/decrease volume, a shortcut to the default music player, Rhythmbox, and an option for accessing the Sound Settings. Selecting \emph{Sound Settings} opens up another window, which provides access to options for changing input and output hardware preferences for speakers, microphones and headphones.It also provides options for setting the volume level for each application. Sound Settings can also be found from \menu{System Settings}. It is known as \emph{Sound}.