Music1969 said:



And of course, even Amir has seen differences between SPDIF and USB before...



A couple examples below. Note I am not claiming any of these anomalies are audible - just that they may be interesting to see/know, versus not seeing/knowing...



Just one example of 16 bit vs 24 bit (both SPDIF in this case):



View attachment 26236



One example of USB vs TOSlink:



View attachment 26237 I agree there'd be no point, unless something unexpected results, as has been the case in many of JA's measurements over the years... otherwise I doubt even he would bother with 16bit vs 24bit either, if everything was always consistent and as expected...And of course, even Amir has seen differences between SPDIF and USB before...A couple examples below.Just one example of 16 bit vs 24 bit (both SPDIF in this case):One example of USB vs TOSlink: Click to expand...

You examples on the jitter test show what I've been talking about. In 16 bit those spaced spikes are supposed to be there touching the green line. In 24 bit those spaced spikes are lower and below the noise floor of the device which is why they don't show up. You have a few unwanted spikes around the central tone in both cases.In the USB vs Toslink example they are essentially identical other than those stray tones in the USB at -133 db and lower. It is mildly interesting, but otherwise not that revealing.I like showing spectrograms of sweeps with different depths of the spectrogram. There are many things you can see in that one graphic. But it isn't common, and many would look and wonder what are they seeing. I'd like to see a spectrogram sweep with a depth of -100db and -120 db for each device (and -140 db if -120 were unusually clean). But Amir makes the most of what he is doing. So I can't expect him to show all these other views just in case something interesting is there.