Here is a thought...I have a Hercules Game Theater XP card which has digital coax, toslink, on both input and output. I'm fairly positive that it does passthrough without a problem, for instance from a satelite receiver into the hercules into HT receiver...now I am wondering if it does this from a toslink connection to a coax connection..could be useful to make that conversion. I'll have to try it out and see. by the way, is this a waste? in othewords, how expensive are toslink to coax converters?