Your own plots.
Holo May pulse response at ~200kHz reduced sampling rate and a normal 3GHz for demontrating ringing. Not going to argue with you over and over again.
You are doing good job when taking measurements, it is worth to mention. But I am not going to accept your teaching. Thats all, thank you.
You don't need to take my word for it or believe my 'teaching'. Here's a practical demonstration for you to relieve any doubt:
He claimes that pulse test signal cause ringing, while a test made on the same equipment is virtually free of ringing when a device under test is a pure NOS, like in a case of Stereophile tests of Audio Note DACs. I checked two tests, results are the same. Audio Note DACs do not cause ringing, plain and simple. There is a need to look for other source of energy that cause ringing.
The test on the Audio Note DAC 2.1X done by John Atkinson was made with a high bandwidth oscilloscope, not on the AP analyzer. Hence why the graph format is entirely different.
An oscilloscope with a sufficient bandwidth will not show ringing because as described above (AND demonstrated in the above video), the ringing is not 'caused by the DAC', it is caused by insufficient bandwidth on the ADC to describe a square wave with minimal ringing.
Possibly Schiit does ultrasonic scrambling as well?
PLEASE explain what you are referring to when you say 'ultrasonic scrambling'.
Seriously, none of these devices show any unexpected ultrasonic content whatsoever.....
There's less than 13uV RMS up to 1Mhz, and less than 1.7mV RMS upto 100Mhz, most of which is probably just RF noise being picked up by the cable itself.
'Ultrasonic scrambling' isn't a thing....
If there was high frequency alteration, be it oversampling, noise shaping etc, it would be very visible.
He also ignores the fact that Holo Audio cut off frequency do not adhere to the sample&hold theoretical data, it is what John Attkinson pointed out. It doesn't bother him, but it was a big problem when it was needed to prove Denafrips NOS case. Very selective, carpal tunel syndrome.
Yes it does. And no I'm not ignoring it, I've talked about this when discussing the denafrips stuff previously (from my ares 2 vid for example):
At least Denafrips doesn't cause ringing
ANY signal from ANY DAC with content above nyquist will cause ringing. Again, this is NOT an issue of what's coming out of the DAC. You are mistaking a limitation of the measurement setup for behaviour being shown by the device under test.
John Atkinson in the article was very clear about this too.