By default ubuntu 9.04 uses PulseAudio which use only 2 channels by default. I am using creative 4.1 speaker system . After installing Ubuntu I realized that only 2 speakers are working . After some googling I enabled the surround sound.
You can find the default configuration in /etc/pulse/daemon.conf.
sudo gedit /etc/pulse/daemon.conf
You can find a commented line ;default-sample-channels=2 in daemon.conf. Uncomment this line(remove ; ) and change this according to your surround system . For me its 4.1 so my entry is like below
default-sample-channels = 5
If it is 5.1 then entry should be like default-sample-channels= 6
You have to restart pulseaudio( kill the pulseaudio and run it again from run dialog) or restart your machine.
#1 by PsychoNix - May 23rd, 2009 at 04:54
Thank You So So So Much i have been looking for this for a long long time finally I got my 4.1 Working like a charm
#2 by achin - February 11th, 2010 at 16:27
my 4.1 creative speakers are not functioning well..
2 out of are working…
i have tried”sudo gedit /etc/pulse/daemon.conf”
thing also
still they are not working