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Music servers and other computer based digital audio technologies.

RE: 1) without a doubt, #1 is digital source jitter

The Wolfson WM8804 and WM8805 S/PDIF transceivers buffer and reclock the incoming S/PDIF stream so that the outgoing signal jitter is entirely dependent on the chip's driving clock. Their approach and measurements are published in an AES paper A high performance S/PDIF receiver [PDF]. I happen to use this chip for this reason.

Custom-designed solutions may also buffer and reclock so the outgoing signal does not get unduly influenced by the incoming signal. I know there are DACs out there that take this route.



Edits: 04/07/12 04/07/12

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