do you mean 5.1/7.1 or you have 2.1 or 4.1 speakers ?
https://wiki.ubuntu.com/Audio/AlsaInfo do your driver have a volume control for the subwoofer ? https://wiki.ubuntu.com/PulseAudio/Log ** Changed in: pulseaudio (Ubuntu) Status: Confirmed => Incomplete -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to pulseaudio in Ubuntu. https://bugs.launchpad.net/bugs/1194457 Title: Subwoofer and whole volume controls are linked Status in “pulseaudio” package in Ubuntu: Incomplete Bug description: Under System Settings->All Settings->Sound, this is an interface problem. I suspect it would happen on any sound card or condition as long as mode is with subwoofer. When I slide volume control bar under any x.1 mode in the sound setting, subwoofer volume would change. When I slide subwoofer volume, whole volume would change. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/pulseaudio/+bug/1194457/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
