Sorry, I thought it was 0.76ns, noted.
Yes, it's for one receiver, but the flaw seems to relate to something within HDMI itself and the Yamaha costs $1,899 USD with 7.6ns jitter, so I'm inclined to think cheaper HDMI audio has weak SNR and bit depth due to jitter, so much for DVD-Audio then?
To be honest, I'm kind of curious about the test, procedure, and spectrum for the other devices. It's pretty unusual to get spikes that far out, from what I've seen.
How is the timing usually reported for jitter, anyway? Max difference of one cycle and another? Average difference between average time and min, between average and max? Some kind of rms value? Anyway, with a 10 kHz signal, a cycle takes 100,000 ns. Even if 10 ns were to indicate that some cycles take 100,010 ns and others take 999,990 ns, you'd expect to see spikes or spreading at 9990 - 10010 Hz, right? What are those spikes doing at 7 kHz and 13 kHz then? That's a bunch of orders of magnitude away. What's causing it to only happen there and that strongly? Does it have something to do with the HDMI receiving itself? Even if it does, why is the number reported in the single digits ns?
Maybe I should think about this after going to bed.
By the way, those are spectrum from J-test: 11025 Hz single tone (quarter of 44.1 kHz, tested at that sampling rate) with LSB toggled. It's supposed to be a worst-case scenario. All that spreading next to the 11025 Hz tone and all those spikes out from the noise floor are caused by the jitter. Well, you can see the noise floor in those graphs, but those are jitter tests, so it's weird to describe those as DAC noise floor measurements. The general noise floor is from things other than jitter of course.
Edited by mikeaj - 6/19/13 at 10:16pm