Getting sound working on Linux mint 13 Mate

view full story

http://unix.stackexchange.com – I have just installed linux mint 13 and I haven't used linux before so I apologise upfront if this question seems basic. I am unable to hear any form of audio on file which I try to play in any "media playing" application but I am not sure why. When I log onto the system I get the start-up sound (before entering login details). I can hear audio from my speakers if I right click the speaker icon, select "Sound preferences" > Hardware > select my speakers from the device list and click test speakers. I am also able to hear audio on sites such as youtube. I have run this command lspci -v | (HowTos)