Just to update, another poster with a different issue shared their 'cog' options with a screenshot. It would appear latest version of Zorin 17 now uses xorg by default and Wayland now second opfion.
In relation to audio, I have had countless issues with my surround sound system only coming out of front centre on other OS's, and in respect of Zorin speaker test producing test sounds from wrong source (e.g., rear speaker coming out of subwoofer and additionally Zorin saying source is from S/PDIF when no such connection present. My solution solved the issue in PCLinuxOS and Q4OS using settings from the audacious application: