Hello All...... I seem to have a problem with my new Pioneer VSX921 I have just brought this to replace a 920......long story ! - However I have connected it up the EXACT same way as I had the 920, being optical cable from the Sky HD box and and HDMI from the HD box to the TV ( Pioneer PDP4280 ) With the 920,if I switched on the amp and pressed the Sat/TV input on the amp remote,the TV sound muted and the sound came from the amp. With the 921 this does not happen and the sound comes from both units I have tried several differnt options / connection methods / turned things off and on in the menus but still get sound from both units ? Any ideas ?