Hi, Thanks for your reply
As I said my Sonos sound bar reports that it is receiving stereo PCM on ITV HD etc from my V6 box and the audio is pretty poor quality and low volume, all other channels BBC, Channels 4, 5, Sky, film 4 etc. channels are reporting Dolby digital/stereo 2.0 or 5.1 and the quality is excellent. But if I revert to watching ITV channels through my ariel the sound bar reports Dolby stereo and the quality and volume output is brilliant just as good as all the other channels through my V6 box. This is what I don't understand, I would of thought the ariel quality on ITV would be poor and from the V6 would great and not the other way round.
Maybe I have a fault when receiving ITV channels through my VM V6 box, but it is annoying when I change from ITV to other channels and the volume is booming and I quickly have to hit volume down button.