Another possible solution might be this: Audio playback issues and surround - #14 by JimKnopf
With this solution you may get HD audio to your AVR and 4K to your TV at the same time… It costs around 150 bucks, but you’ll get the best of your Vero, your TV and your AVR without having to upgrade or make compromises.
Maybe some users over in that thread can give you some feedback how they’re doing with that solution.