Back again.

Haven't had a chance to swap out cables etc but thought I would mention a couple of things.

1.Playing a BD, I checked the output from the player on screen and it read DTS HD Master Audio 5.1 48khz.No surround sound at all (no ambience) and the 568 reads 96K.

2.I've had this set up for just over a year, but for various reasons, had not been able to use it in that time. I did, however, find some questions I had posed a when I got it, and I had no surround then either.I assumed it was down to a defective HD621 (it was defective-just had new main board fitted) but it hasn't solved this problem. So basically it didn't work before the settings update either.

568.2MM, DSP5000(96/24), DSP5000C(96/24), 596,Sony BDP S570, Sony HX903 TV.