I purchased my Playbar yesterday and to be truthful did a lot of research comparing sound bars for quality, sound, and cost, but the topic the TV optical/toslink output not passing 5.1 didn't come up until the sales man at BestBuy advised me to check the specs on my TV. Well my Samsung TV (UN55c8000) is one of those that doesn't support 5.1 on the digital output (toslink) port when devices are connected via HDMI to the TV.
I'll save anyone interested in the Playbar / Playbase some 80+ hours of research...read this article.
Your support forums are full of similar questions requesting advise/information on connecting multiple devices via toslink to the Playbar, yet there is no direct response form Sonos that i can see on a recommended product. I also checked your Shop/Accessories link and no products listed. For such a common issue I don't understand why you don't have a solution or a recommended certified product. The Playbar is expensive and I don't want to pair it with a junk switch and fill your forums with all kinds of questions.
I have been struggling try to find/decide on a toslink/optical auto sensing switch. It seems most are manual and relatively cheep. I did find one from Flexson ($109 vs Sewell $32 ), which claims to be a company that make accessories for Sonos.
So, what the big difference in the cost??? Neither are auto switching, very little specs on both.
Sonos needs to provide better support and reduce all the chatter on this topic. Your marketing about the simplicity of the single optical input and less wires, get blown out of the water when you have to start adding an optical switch (which requires a power cable and an addition remote for the switch). This is an expensive piece of equipment not to have a certified solution from Sonos. Shame on you to put us though all this.
Do you have a certified product or recommendation?
If I don't find a better/elegant solution soon I am returning it and going with Bose.
PS... hire Chris Boylan to provide Sonos recommendations!