1) Remove two lines you have added to /etc/modprobe.d/alsa-base.conf
2) Save and reboot
3) Start playing music in the background
4) Run "alsamixer" and start tweaking settings
a) Press F6 to change output devices
b) Press Tab to change between "Playback" and "Capture" views and increase volume (up key) on Playback settings.
c) Some of the devices might be on "mute" [MM], change this by highlighting device and pressing "M" on your keyboard.
If that does not work, try the following :
1) Remove two lines you have added to /etc/modprobe.d/alsa-base.conf
2) Save and reboot
3) Start playing music in the background
4) Run "alsamixer" and start tweaking settings
a) Press F6 to change output devices
b) Press Tab to change between "Playback" and "Capture" views and increase volume (up key) on Playback settings.
c) Some of the devices might be on "mute" [MM], change this by highlighting device and pressing "M" on your keyboard.