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RE: Erm...

Howdy

We're probably going around in circles, but there's effectively no difference between synchronous data delivery and asynchronous data delivery IF the DAC is the clock master (and also if both provide reliable data.) In both cases there is a local buffer whose output is clocked by the (local) master clock delivering the low jitter output.

As I said these DACs have been around for a long time. (I have more than one and that's one of the ways that essentially all progear can operate.)

If you had said that USB versions of them were a recent innovation I'd agree, but you didn't qualify your statement. I'm glad that a more or less standard interface (USB, with proper drivers) will allow for more jitter free operation than the common consumer interfaces of S/PDIF, AES/EBU, etc. But there are plenty of other less standard interfaces out there which get the same results and it's too bad that they haven't been used more widely to help with the jitter problem for more common consumer gear for the last couple of decades.

-Ted

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