You answered your own question in
post 32 already.
If you're still not convinced, you can read the listening impressions thread over at CA by people who own some of these brands or ask them directly.
Barring that, you'll have to take a USB Regen andstick it into the USB inputs of
one of those DACs and hear for yourself
.
In Post 32 I guess I could have said "none -
that publicly markets this angle" in the first line. However, I felt Post 32 made it abundantly clear that the point of the post was to voice my opinion about how ridiculous it is to claim the designers I mentioned and many others don't fully understand the importance of the simple design parameters now being marketed by Uptone. I am not sure how you could have taken the post as an acknowledgment by me that the point I was arguing is true was in fact false, but if you did please insert "none -
that publicly markets this angle" into the post's first line and I am sorry to confuse things.
Now back to the discussion at hand. Your reference to the devices I mentioned as "dacs" may possibly be an hint as to the root of our different views. They are NOT dacs. They are SOTA usb interfaces that address every aspect of usb transmission but do not market their "secret sauce" all over internet forums.
Have you even looked at these SOTA usb interfaces (which you confused with dacs)? Lets take just one device to start. Have you analyzed why Andreas re-clocks the way he does and went to glass for transmission? Was the clock and clean power to clean up SI? Was the glass to mitigate obvious impedance at the dac and overcome the limitations of galvanic isolation which stop current but do nothing to inductance, capacitance, and RMI (all things the JS is trying to improve at the at the PS and PDN to keep the PHy from working too hard). Or was it because he thinks glass is pretty?
When you are done with the PBD USBx take a look at the MSB Quad DSD USB2 device. It is used at the dac input; and claimed by many to be the best usb interface they have ever heard. It does some neat things with usb in the msb i2s input which address these issues. Could this be happening if what you say is true about the singularity of Uptones expertise?
I do not claim to be omniscient (as you do) and know whether these designs which just coincidentally address the same issues as the Regen were by accident or they were intended. As I said I certainly know where I would bet my money, but remember this discussion is
not about whether the regen works. It does and I have never disputed this, its about you and Norman's comments that:
Norman=> "Uptone
are the only experts in this very specialist emerging area."
You => "indeed Uptone and John
are the only ones who did a rather thorough investigation, analysis, prototyping and marketing of a product which specifically deals with frequency optimisation of the PDN noise profile by focusing first and foremost on signal integrity."
So I ask again, can you now confirm that you recognize Uptone is the only company "publicly marketing" this angle or can you categorically state you have evidence that no other digital designer has ever addressed this matter. These two concepts are very different things. If you have such evidence, may I ask how you got it from each and every digital designer on the planet?
I love learning of this type of thing. I am seeing more and more companies in the high end audio area starting to do this. It's great and it's needed, especially if we are going to ween folks off of bad sound quality and get them to re-engage with music somehow.
