It should rather focus on the jitter over frequency, electric noise in case of coaxial or eye pattern analysis. Instead we got a test which checks if there is some sort of the audio processing involved which affects the stream.
No, it's not a jitter measurement. It's just a way to show that the quality of digital outputs differ, even if some people say that it's 'perfect' based on the rather irrelevant results of some tests.
Damn, I really hate being constantly quoted in the context of Canard's comments ;) But to the point, his point is that tests like Amir's don't say anything about the actual quality of a digital audio output. And it's hard to disagree; suffice it to say that, according to this methodology, almost...
This makes perfect sense. Power supply-generated interference can affect the operation of devices connected to the media used for digital transmission. Power supplies influence the stability of oscillators, and therefore contribute to jitter in isochronous digital transmission.
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