When I cast the NOWTV app using my android 10 phone (pixel 3a) it works and picture seems to be HD but the sound is showing as stereo. Went to the NOWTV app on my phone and can't switch to 5.1 surround. It says I need the Boost pass but I already have that and can switch to 5.1 on other devices like Youview and PS4.
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Bit of a long shot, what happens if you sign out of the NowTV App on your phone, then log back in again with the same account details that you use on your PS4 / Youview Box ?
If that doesn't work perhaps try a fresh download on the NowTV App and Google Cast App on your smartphone.
I don't use my Chromecast for streaming NowTV so i won't be any further help.
Then hopefully you can do this.
To select surround sound:
To select stereo:
If you have the Chromecast directly hooked up to a HDMI switcher box, see what happens if you bypass it and plug the Chromecast Dongle directly into your TV or AV Receiver.
Edit - Also assuming you are using a generation 3 Chromecast or Chromecast Ultra with the HD Boost Pass ?
Help tipIf you're using Chromecast with iOS, you'll need to have the latest version of the NOW TV app (10.12.0) to enjoy Boost.
Reinstalled the android app, no difference.
The Chromecast is directly plugged into the TV and then I use HDMI (ARC) to a 5.1 receiver & speakers.
My other HDMI devices are plugged into the receiver and get 5.1 fine and I have a firestick plugged directly into the TV and that gets 5.1 ok.
If you look at the screenshot the Chromecast options for stereo and surround are greyed out so could it be because i get NOWTV through BT?
As a quick temporary test what happens if you plug in your Chromecast Gen 3 or Ultra directly into one of the HDMI input ports on your AV Receiver ?
I don't think if you are a BT TV customer matters if you subscribe to the BT TV NowTV HD Bolt on Package (might be wrong though because i am not a BT TV customer).
Appreciate your help and ideas on this 😎👍🏻
Just plugged the Chromecast into a spare HDMI port on the receiver and it's still casting stereo😞How annoying!
As I said I can do NOWTV in 5.1 on other devices wether they are plugged into the receiver or the TV.
Just been playing with other apps that can cast such as YouTube and BBC iPlayer and they are also just outputting stereo so it's either the Chromecast settings, my pixel 3a or the amp. I'll have a play around.
If anyone else had a Chromecast V3 and NOWTV BOOST it would be useful to know wether surround option is available..
Changing to 5.1 on the NowTV App with my Chromecast Gen 3 worked for me using my Sony Xperia Android phone.
Here's the screen shot
No idea why it's not selectable for you if everything is up to date.
Under My Account on the NowTV phone App I was using Standard play back quality.
I am guessing your phone and Chromecast has the latest update?