After doing killall pulseaudio the sound seems back to normal. Marking this as invalid until I collect more data.
** Changed in: pulseaudio (Ubuntu) Status: New => Invalid -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to pulseaudio in Ubuntu. https://bugs.launchpad.net/bugs/1905717 Title: HDMI audio unusable after update to 13.99.1-1ubuntu3.8 Status in pulseaudio package in Ubuntu: Invalid Bug description: After a recent update of pulseaudio and related packages to 13.99.1-1ubuntu3.8 on Ubuntu 20.04.1 LTS, audio via HDMI output became crackling and distorted, rendering my monitor speakers unusable. This is particularly frustrating because I cannot seem to roll back the update without uninstalling a good chunk of gnome(!) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/pulseaudio/+bug/1905717/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp