Pass SPDIF signal through from In to Out (Gaming) question

Question

So, I'm pretty much a noob when it comes to HD audio and whatnot, so I im learning that I lack the terminology to efficiently search for what I want.
I have a set of Surround Sound headphones (5.1) that I use for both my xbox and PC. The headphones only have optical SPDIF for input.
What I am currently doing is, when I switch between playing on PC and Xbox, I swap the cords over. (I understand that this could be accomplished with an optical SPDIF switch)
But recently I picked up a Soundblaster Z card on the cheap. Now this card has an optical In and Out.
I was wondering if either of the following things are possible with the configuration (while being low enough latency to play games) while maintaining 5.1 sound.
Xbox >> (optical in) Soundblaster (optical out) >> Headset
1) Be able to just route the 5.1 signal coming into my computer (via optical in) to the optical out, sending it to my headset. I could then just setup a hotkey/macro to switch to this instead of having to swap cables whenever I go from PC to Xbox.
2) (probably hard to do) Same as above, but also mix the audio form my PC into the signal, so the headset would play a mix of both. (From my understanding, this would involve decoding the signal, mixing in the PC signal, then encoding again).
I know AC3 Filter and Virtual Audio Cable are common tools used.
Are either of the above things possible?

Answer 1

DECLARE cur CURSOR STATIC LOCAL FOR
   SELECT col1, col2, ...  FROM inserted
OPEN cur
WHILE 1 = 1
BEGIN
   FETCH cur INTO @var1, @var2, ...
   IF @@fetch_status <> 0
      BREAK
   EXEC yoursp @var1, @var2, ...
END
DEALLOCATE cur
However, it's a lot better if you can make the logic set-based, particularly if thousands of rows can be updated at once. There can be astonishing differences in performance. Admittedly, some logic can be very difficult to do set-based, but nothing of
what you say indicate that that would be the case.
Erland Sommarskog, SQL Server MVP, [email protected]