Hi, new to Zorin... just installed Zorin OS 15.3 and noticing the exact symptoms described in this article audio - Linux Ubuntu Speakers Popping every few seconds - Super User. Every few seconds when not using audio there is a double-popping sound.
The work around in the site above works for me ... however to make it persist after reboot you are directed to modify
/etc/modprobe.d/alsa-base.conf. I can do these edits but its read-only.
Any advice appreciated.
Long term IT user, noob for Zorin and Linux etc.