My ancient Denon AV amp decodes digital surround over S/PDIF from my Youview box just fine whether from a DTT channel or an internet channel.
Can you tell us a specific channel and programme that it is not working for you so we can try that?
As a workaround you could also connect analogue audio out from the TV to the amp as a failback while you figure out the digital audio issue.
Okay interesting that you're not having an issues, that gives me some hope!
I have struggled to find any Dolby Digital content to test it with, but last night I tested using The Women in Black on Channel 4 HD and also Quartet on BBC Two HD (I think). Both had the prized "[SS]" and changed my amplfier to Dolby Digital but neither delivered any audio. So I've only tested with Freeview HD so far.
I hear that the BT Player films have Dolby Digital too, but I'm loath to pay and try if its not going to work.
BBC3 is 5.1 from 9pm to 11.15pm tonight - nothing on any BBC channel before them
What streaming HD channels do you subscribe to?
My sony amp is 10 years old and works fine. It is interesting that you say the reciever is recognising the DD signal but playing nothing.
I have found there is getting more and more proper 5.1 encoded stuff but it is still a bit sparse. I find some of the internet HD channels do quite a lot (try MTV HD).
There are not many options on the YouView box, you have said you have changed to surround in the settings, does your amp have a hdmi input that you could just test it with. I don't see any reason why your amp shouldn't work but the amps tend to have many more settings than the YouView box so I would be looking through my amp settings first...I would also go with a hard re-boot of everything just to start with before testing.
I have just had Youview installed and am having the same problem... set to surround via toslink, but Denon amp only receiving stero (on SS broadcasts on HD channels and Netflix app with confirmed 5.1 sound)
Did anyone solve this?