I started with Ubuntu 12.04 Minimal. Then installed only 3 utils
sudo apt-get install xorg xinit google-chrome-stable alsa-base alsa-utils alsa-oss

I have added google-chrome to .xinitrc file.

Used sudo alsamixer to unmute everything using M.

Also I am able to hear sound when I run this independently in a terminal
sudo aplay /usr/share/sounds/alsa/Front_Center.wav

However Google Chrome is not giving any sound output be it on youtube or the same file (/usr/share/sounds/alsa/Front_Center.wav) opened by browsing in chrome.


UPDATE : the moment i install some Desktop (display) Manager like gnome or lxde and launch chrome then, the audio is perfect success.
However if i kill the xsession and the desktop manager (lxde) AND then start with loading only the chrome (without DM) then again i loose the sound.
This makes me wonder that there is something which is not allowing the sound to be loaded into chrome directly, but once the session like lxde loads, then it works flawless.
I am thinking that i should rather ask, how to authorize google-chrome to use sound software?

Miscellaneous : I am surprised to know that I cannot start google-chrome by sudo command (it asks to be a normal user) &&
that i cannot start alsamixer as a normal user (i must use sudo alsamixer )

May someone please help what i need to do so that google chrome speaks????