I have solved my intermittent sound issue.
I have a QN65Q6DRAF tv. After setting it up I found the sound was dropping out intermittently for about a second. After searching the web on several occasions I ended up switching to PCM which I was not happy about so I went back and disconnected my BOSE Acoustimass sound and just using the tv speakers. Problem went away but sound quality degraded. Further searching I discovered that a post saying the sound signal might be too complex for my older sound system. I purchased a new Samsung Soundbar HW-Q70R This fixed the issue with the sound dropping out.
For those who care there is more to this story.
Now my sound is lagging the video when using the HDMI ARC connection. After a bunch more time spent on the internet I have ended up with my cable box into HDMI port on the soundbar and then using the ARC connection to the tv. Fixed sound but now my PS4 and Apple tv are left out so I purchased an Insignia NS-HZ335 3 in 1 out HDMI switch. The out from switch to HDMI in ARC out to tv.