Hi, I am using X5 boxes to receive intelsat 907 in Portugal. There is a problem, which seems to have developed recently, whereby the HD channels, BBC, BBC2, ITV, Ch4, are giving an effect like an automatic level microphone. While there is plenty of speech content all sounds OK, if there is a gap the sound drops then comes back loud with the next sounds. I have five boxes the same. I have tried latest firmware, oldest firmware and installing from scratch. This is the model with just X5 on right side (not X5 HD PVR) Is there some way of setting sound type i.e. mp2, mp4, AAC? The HD channels need AAC setting. Any thoughts?