How to enable 5.1/6channel speakers in Ubuntu 13.10/13.04/12.10/12.04, Mint 15/14, Elementary OS & all Ubuntu Derivatives

> Open Terminal or press Ctrl+Alt+T (shortcut to open termianl) and enter the following command

alsamixer

> Select your Sound Card by pressing F6
> Move to right by pressing the RIGHT arrow on your keyboard
> Select <Channel> option and press UP arrow key to select your channel (select 4ch if you have 4.1 Speakers or select 6ch if you have 5.1 Speakers) & Press ESC key

> Test your sound now :)