Increase the system wide sound (volume) in your linux (ubuntu etc..)

Here is another trick to increase the sound (soft volume) in Ubuntu Linux, this time system-wide.

1. Edit your /etc/asound.conf file.

On your terminal type

$ sudo gedit /etc/asound.conf

2. Paste the following into the asound.conf file:

pcm.!default {
   type plug
   slave.pcm "softvol"
}

pcm.softvol {
   type softvol
   slave {
       pcm "dmix"
   }
   control {
       name "Pre-Amp"
       card 0
   }
   min_dB -5.0
   max_dB 20.0
   resolution 6
}

3. Restart PulseAudio:

$ pulseaudio -k >/dev/null 2>&1

To make sure pulseaudio is stopped:

$ killall pulseaudio

And then:

$ pulseaudio -D

$ pulseaudio ;

Finally Restart u r system…….

courtesy: http://webupd8.blogspot.com/2009/08/increase-maximum-sound-level-in-ubuntu.html