Thank you Frank.

So my G68J will be fed digital multichanel audio stripped out from the HDMI output of my chosen Bluray player. If I understand you correctly, it's basically an all digtal equivalent of connecting a Bluray player's analogue multichannel out to my G68J's analogue multichannel in?

That's a very clear and helpful answer and I would consider that avoiding the two conversions you speak of makes a HD621 a worthwhile purchase.

One follow up question, bearing in mind that my G68J does not decode/process Dolby True HD. Does my Bluray player need to have any special capability (e.g. onboard decoding) to allow me to hear Dolby True HD audio through a HD621/G68J processor combo?

Is the only requirement that the Bluray player I use must have an HDMI output, which they all do, allowing me to use a Playstation, for example, as my source.

G68, HD621, DSP5000(x3), DSP420(x4), MF10, DVP1080