Page 82 in trouble states that "HDMI component doesn't accept multichannel audio signal". In Sol it states that "COnvert multi channel signal to 2 Channel signal at source"
This means HDMI only processes stereo sound and NOT multi channel i.e. 5.1/7.1 etc.
If u r using HDMI with 463 for multi chanel audio and it is working, pl confirm. It wil be a great help.