Profiling via S/PDif

I have a bunch of digital boxes that I would love to profile.
Of course I can profile them the analog way via analog ins and outs, but I think that bypassing 2 AD DA stages would be even more desireable in terms of noise and sound quality gained.

So... requesting profilling via S/PDif... i don;t think this should be too hard to implement, what do you reckon?

I don't think that this would be impossible to implement, no?

Maybe CK could let us know if this is possible