I posted a question like this in the GSX1000 thread, (and actually all over the internet, e.g. [H], AVS forum, with no answers) but am reposting it here generally in case anyone else knows the answer to this. Do either of the following products exist, to anyone's knowledge? A device that: (1) re-digitizes analog multi-channel signals into multi-channel PCM out via USB, or (2) decodes a digitial input Dolby Digital (AC3) or DTS (e.g., from toslink) to multi-channel PCM out via USB. Do either of these exist? I have scoured the internet for this and have not found it (at least, nothing that does not cost thousands of dollars and seems geared to music engineers). The cheapest and closest I got was the Behringer ADA8200 but that outputs ADAT which doesn't solve my issue (I can't find any ADAT==>USB converters either). I am aware of things like the Creative X7, but I am more just looking to see if this functionality is possible, such that any virtual surround headphone device, even if it lacked Dolby or DTS licenses, could theoretically be used with any source, bitstream or otherwise, by having something in the middle doing the decoding.