We need a new standard in transferring digital signals between audio equipment.

[Superdad]

2 hours ago, PeterSt said:

 

Take the PCM1704U-K then (24/768).

😜

 

How could he Peter? I seem to recall that you (at Phasure) own nearly all the world's remaining PCM1704 stock.  At least all the best (and no counterfeit) versions! 

[Superdad]

56 minutes ago, kdubious said:

Seven hundred sixty eight what from that chip?

 

Yes, the Burr-Brown PCM1704 has, from introduction in July 1998, been capable of accepting data at 768KHz sampling rate. The DF1704 was the filter chip BB offered to pair with the PCM1704 and it could be set to oversample 16X to feed the DAC. 

The capability has always been there, and there were a few DAC makers (Dodson was one IIRC) who ditched the lousy DF1704 and created their own filters to feed the PCM1704 at 768--internal to the DAC box of course.

But it was not until many years later--when USB at 768 was implemented--that computer to DAC at that rate became possible.

Where I recall @PeterSt being the first was that he was the first with software SRC to create that rate to send.  [And his "ARC prediction" filter is legendary; If only XX-HighEnd had an user interface that his mother could love... ]

[Superdad]

3 minutes ago, botrytis said:

Noise is noise and and if it affects music it would affect other digital data.

Well your NAS hard drives and printers don't have audio sample rate-related DAC master clocks.  Those are very susceptible to jitter-inducing ground-plane noise on their PCBs. It is the result of that--induced in various ways from upstream--that ultimately affects SQ.

Put a differential probe on the pins of an audio master clock in a streamer/DAC, attach that to a proper-noise analysis system, then vary power supplies and switches upstream.  Then you will see how ground-plane-noise gets in and jitters the DAC clock.  

This, in the shortest nutshell I can write, is the entire reason people can hear any upstream variances with packet data interfaces (USB, Ethernet, etc.).

[Superdad]

2 hours ago, botrytis said:

I am talking data like from 100K instruments, etc. It still holds.

Sorry, it is not at all clear what you are speaking about. What kind of "instruments?"  100K? Dollars?

 

Again, we are not speaking of the data bits (just a concept in themselves, but indeed the "ones' and "zeros" that PHY/MAC processors convert and transport) being changed at all! It is all about the electrical passage--of amplitude and phase modulation noise converting back and forth in form--from the chips, from the imperfections in data clocking, from common-mode leakage currents that are entering. All leading to inducement of ground-plane noise on the PCB of the DAC, infecting the DAC's master clock.