Thanks. I changed to PCM and the sound returned to my normal level, solving my problem. This creates a different situation - it made no difference to the rugby yesterday but improves my football commentary listening. Also, if I apply PCM to a HD football match, it has the effect of raising the crowd noise level and leaving the commentary level the same, with the result that the crowd noise drowns out the commentary and I have to remove PCM. Maybe this is food for thought for the audio engineers at the matches.