I installed Zorin OS 16 Core on my laptop. It is an Asus ROG Strix model G512LW. It has Intel Smart Sound Digital Sound Processor.
The sound itself works as the POST issues a sound.
I've followed the steps from the Zorin website, installed puseacontrol as suggested. When I go to volume control with playback maxed, volume control with Speakers no sound - the bar bounces back and forth but no sound. If I put headset on the sound works fine.
I installed it without the Intel drivers and with the Intel drivers - makes no difference.
I have looked at other posts here but I haven't found any success.