I was having this same issue I installed Gnome ALSA mixer, and played with the LFE level, clocking it down and returning it back to high and it seems to have fixed the problem.
-- nvidia audio - slight high pitch buzz https://bugs.launchpad.net/bugs/228024 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
