Mines packed away in the box now - but looking at a US manual online, and assuming it has the same inputs, there is no specific digital audio input for SACD/CD.
http://akamaipix.crutchfield.com/Manuals/158/158STDG820.PDF Not sure what Eric was refering to?
Regarding the issue I had with no audio at all when connected to my DVI-D panel - as has been pointed out elsewhere this IS an (fairly fundemental) issue which is mentioned in the manual on page 24.
"
We do not recommend using an HDMI-DVI
conversion cable. When you connect an
HDMI-DVI conversion cable to a DVI-D
component, the sound and/or the image may
not be output. Connect other audio cords or
digital connecting cords, then set "Digital
Assign" when the sound is not output correctly."
(But that doesn't work)
So this amp is deffinately not for you if you have a DVI-D input panel.