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Upsamplers, DACs, jitter, shakes and analogue withdrawals, this is it.

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It would be a deal-breaker for me indeed.....to this reviewers credibility.

Hi,

Looking at this, I do not see Jitter. I see 50/100Hz (or 60/120Hz) components most likely caused by a ground loop in the measurement set-up.

One should expect someone performing measurements and publishing them to show enough competence to first make sure they do not measure "instrumentation ghosts" and to secondly be able to interpret such measurements correctly.

Sadly this mistake is common, I remember two high profile Reviewers measuring similar components as Jitter on one product I helped design.

Except it was not jitter but 60Hz related hum, to be precise at around -115dBFS from the 2nd Harmonic of a small amount of hum, which was interpreted as around 200pS P-P Jitter, when all it was was -105dB 60Hz hum converted to H2 in the tube stage.

I would say is not bad for AC powered gear with Tubes.

Anyway, the actual jitter was equal to the noise floor, which was as expected 16Bit audio,sofor 16Bit audio at least there was zero jitter added by the product...

So making measurements and interpreting them is a challenge.

I spend a fair bit of my 3 years for my EE Degree in the classes of a formidable gentlemen who started classes by loudly intoning "Wer misst, misst mist!" (Who measures, measures manure - literally from German).

He alerted us to the fact that making measurements is fraught with occasion for errors, interpreting measurements even more so... The name of the Module he was teaching? Measurement Technique!

Thor

At 20 bits, you are on the verge of dynamic range covering fly-farts-at-20-feet to intolerable pain. Really, what more could we need?

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