Not to mention, you just KNOW that no matter how clearly you might label it like "S/PDIF" or "DIGITAL I/O" – there's always gonna be someone who'll just see the 1/4" jack, try to plug it into their amp and start crying "Hey, why isn't this working?" 
(or worse: "Hey, 'digital' means it's cleaner right? So I thought plugging it into my amp would give me an even cleaner sound!" LOL)
nickrose:
badmelonfarmer:
could you use a standard 1/4inch jack to suply SPDIF?
We probably could, but I would expect that we would (rightfully) get a lot of abuse for a non-standard connector.
