This has been going on for years, at least since 2013 when I bought most of my Sonos system. Many people have requested it here in the community, but I’ve yet to see it done or explained why it technically could not be done. So today, I made an account to find out.
As a technical person in the IT field for 20 years now, I’ve also dealt with a good amount of audio and home theater equipment over the last 30+ years. I just can’t imagine it would be that difficult to add a button to the app to allow the TV to play FULL RANGE stereo music to the Playbar/Sub/LS/RS setup. After all, it is already done for music.
Maybe it is a limitation of the internal optical sensor or other hardware, or perhaps it is just programming since the optical signal is digitally controlled. My 2018 LG TV is optical to the soundbar, and the only settings are Auto or PCM, which makes no difference, I’ve tried.
I just got a Chromecast with Google TV over HDMI, and I tried Twitch streaming there hoping I would be able to send 2.1 stereo unlike the Roku. Well, Google let’s you disable all surround, and still no difference. Even with TV set to PCM or Auto.
There could be a limitation of my LG TV I suppose. Perhaps the input audio format on HDMI is passed directly through to the optical output when in PCM or Audio mode, and not modified with LG output settings.
But that would not explain why I saw no difference when disabling all surround on the Chromecast with Google TV via HDMI input. Could also be a bug with the LG TV putting out 5.1 only over optical, but there is clearly an Auto vs PCM switch for optical out. LG says PCM should be stereo 2.1, but I’ve also read that it could be raw.
It really does seem like the optical input on the Sonos playbar completely disregards any and all input audio formats such as Dolby 5.1 vs 2.1 Stereo, and decides that anything coming from a TV must be 5.1 Surround. I guess most content these days is encoded with 5.1, but would be good to have a choice for music.
If that is the case, I can’t image it would be a stretch for Sonos engineers and software team to simply provide an app toggle button for TV Full StereoSurround on the front end. The back end DSP would be instructed to either just play the 2.1 Stereo channel when requested, or a software downconvert from 5.1 to 2.1 might be an option.
So...I’m putting this out there. If you read this, PLEASE comment, upvote, or whatever to make this post go to the top of the feature request list. So many of us stream YouTube, Twitch, AXS TV Concerts, and so much more music content here in quarantine. You spend thousands on a great system, and can’t even enjoy music through your TV at full range on all speakers.
Feel free to copy and paste this where you see fit. An EECB (Executive Email Carpet Bomb) is one option I may try. It’s not hard, Google it. Together we will get this done. All it needs is the right set of eyes on it with Sonos management to have just a little compassion for all of us stuck at home.
And if it’s not possible, will somebody just say so instead of just ignoring the request for years? We need this now...more than ever.
Thanks for your help,
Adam