I am wondering the same thing, documentation on nvidia, card manufacturers, sound card manufacturers are all slim. On top of that all the topics I have read on the net about it are the same.
Some people say no way, dvi cant do audio at all accept ATI?s use of the analog pins on DVI-I.
But I know that is not true because all nvidia card I have seen 7x/8x/9x have SPDIF pins (Even if not Advertised in specs). Ex. my EVGA 8800GTS G92 has SPDIF pins but no docs can be found that say that.
The DVI / HDMI audio Lack of standardization is sick and twisted.
And common card manufacturers how much bother and extra expense can it be to ad a 2-pin SPDIF cable. Some do bust most don?t. I think it is more that they don?t want to deal with the responsibility of supporting how to set it up.
Does it just pass spdif to the hdmi or does it send any digital signal (like 5.1 digital signal since spdif can get at most 2.1 unless using dobly digital or dts; since pc games dont use either of these audio codecs). I guess what I am asking is is there a way to get EAX to passthrough the hdmi on the nvidia card?