Sonos Arc Height Channels

As had stated in my post : 

once again here it is as a summery 

TV : LG Dolby Atmos Vision and Dolby Atoms sound 

Source : Netflix Dolby Atmos content movies 

To your Q - YES the surround speakers are completely silent when playing movies that are in stereo ( 80’s) movies and playing 60’s mono movies 

Hope this has answered your Q 
 

No, not really. What specific stereo and mono movies are you watching? And from what specific source? Netflix? DVD? Blu-ray? VHS? Laserdisc?

I wrote to in my last and many many time : source : movies from Netflix . 
 

From memory stereo from Netflix comes across pretty flat but I can't test it at the moment. Free to air TV stereo sources give me a much better upmix than Netflix I feel. 

Please give us a specific movie title from Netflix so we can test it ourselves to compare.

Faulty Tower, Black adder, vicar of Diby, etc… just to name a few 

None of those listed were recorded in Dolby Atmos, or frankly any 5.1 signal, just stereo, at best, and possibly mono. It’s possible that they’re sending that mono/stereo signal encoded in a Dolby Atmos signal, but you’d still be receiving stereo channels, and nothing at all would be in the height or surround speakers. 

None of these titles are available on Netflix for me to test.

Although I did test Monty Python’s Personal Best on Netflix which is in stereo, and I could hear the music in the introduction through my surround speakers. 

That’s precisely the point 

That is why a system the can make it sound like surround is called Virtual surround function by a device and by DTS/ DTS-X 

I know The senhiser atmos unit can do this and also by LG and Samsung’s Dolby Atmos Soundbar where it plays non 5.1 including Mono transmission into virtual surround by thier units . So please understand I not asking fir the impossible 

I cam see you have not taken the effort or to read and understand my thread history (on this post history here. Please take that effort and do some research too before answering 

Please kindly only reply if you have professional and technical understanding and answers to the solution or recommendation for Sonos team.

Thank you 

@bobmatt The Sonos Arc DOES produce a virtual surround effect with a stereo source. Like I mentioned earlier, I just tested Monty Python’s Personal Best on Netflix which is in stereo, and I could CLEARLY hear the music during the introduction through my surround speakers. I’m sure I could find multiple stereo sources on Netflix and experience the same result.

FYI… I watch YouTube videos in stereo all of the time. I always hear audio playing out of my surround speakers when watching YouTube videos.