Well I installed Ubuntu a couple of days ago and, first I had no audio, but solved it with Alsa-mixer. Now I play the sound test, I try with center and plays it with subwoofer, and viceversa.

I saw somewhere that with this command (gksu gedit /usr/share/pulseaudio/alsa-mixer/profile-sets/default.conf) I can swap the channels editing the text. I tried but at restart didn't work.

Intel P4 @2.80 Ghz
Intel D865PERL mobo
Creative SB Live! sbo100
7/4 Gb RAM

Please Help! I love Ubuntu so much!!!