That's odd. I would not have thought gnome-shell has anything to do with PulseAudio, until finding bug 1759497 :)
** Summary changed: - audio crackling + [Nvidia HDA] audio crackling -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1772578 Title: [Nvidia HDA] audio crackling To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1772578/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs