I'm a newbie and a Ubuntu 12.04 user.
I've tried to solve the problem but I couldn't do it.
My ALSA information is located there: http://www.alsa-project.org/db/?f=ff...748303ae35b0c4
When I go to System Settings>Additional Drivers that's what appears written: "No proprietary drivers are in use on this system."
Well, hope you help me. Thanks.