When this is openly available to all people, people are going to pay for the pro subscription thinking they will get 5.1 sound. They wont get 5.1 sound and they will complain in masses. This is a problem now, but will be a huge problem come launch to everyone.
Same problem here.
CCU connected to the ONKYO amplifier.
PCM 2.0 with Stadia.
DD 5.1 with Amazon Prime ...
In the Stadia connections menu i see the 5.1 logo, but it's just a logo!
This is the answer received from the Stadia Team:
"After some checks we realized that you are not the only one having this kind of problem and our developers are already working on it. As soon as we have news, we will update you. Thanks for your patience"
It's been 3 weeks I've got the sound in game on PCM 2.0.
My Chromecast Ultra is plugging on my amplifier Pioneer.
I posted a message on this forum 3 weeks ago (page number 3)
"Same problem, I've got the first edition I plug directly on my amp Pioneer lx 701 the sound is on 2.0. Like someone else said, I cast a Netflix movie 5.1, get back on Stadia the sound appear on MultiPCM 5.1"
Today, I call the Stadia support in France,
-he doesn't know this problem. He told me to plug the Chromecast on my TV directly and be sure the TV can manage the 5.1
-I can't and I don't want to plug on the TV, I explained if I cast a Netflix movie 5.1, get back on Stadia and that work.
-He asked me to maybe send him a video of that with my AV and TV model to send it for the US.
I launching Stadia, do other thing at the same time. At one moment I was disconnected and needed to re-add my Stadia account to the Chromecast.
And now I really don't know why all works well.. the Stadia menu is on 2.0 and if I lauching a game the AV switch automaticaly to the multi PCM 5.1.
I reboot a lot of times, unplug, plug, that works perfectly.
- TV Panasonic 50CX680E (HDMI 2.0 without HDR)
-AV Pioneer SC-LX701
Interesting that it just started to work for you after simply pluging and unplugging multiple times and then readding your account. I will see if there is a way to unlink my stadia account and then add it again.
Side note, I did get £50 compensation but as credit for play store. I will take it, get a couple more games.
I just wish there was some clear indication from Google that they know about this issue centrally and are doing something about it.
I have found and tested a solution:
Plug the CCU into this device, send the picture to TV on one HDMI cable, and to receiver on the other.
This splitter can handle splitting into two stream of different resolution so TV will still be 4k even if receiver is 1080. Upon starting stadia you might have to tinker a little if it doesn't give you sound. I cast Netflix and make sure I have the right audio output selected on the receiver, then quit Netflix and start stadia.
Other than this annoyance, the only other downside is that it doesn't seem to do HDR now. Even when casting a Netflix HDR title through the splitter I don't get HDR.
Clearly, until Stadia supports compressed multi channel audio for backwards compatibility with non-eARC devices there will be issues.
I really don't understand why they chose not to. Licencing cost probably, but since eARC is only really a thing this year I very much doubt there are many people at all who have both eARC TV and eARC receiver.
Glad you found a solution. Unfortunately I'm in the US and it doesnt look like there is anything comparable... most of the ones sold here are 4k 30fps max. It would just be so much easier if google didnt go the cheap route and implemented 5.1 surround that most people are going to be able to use.