Implications of Esoteric G-0Rb atomic clock


The latest TAS (March 2008) has an excellent piece by Robert Harley: a review of the Esoteric G-0Rb Master Clock Generator, with sidebars on the history and significance of jitter. This Esoteric unit employs an atomic clock (using rubidium) to take timing precision to a new level, at least for consumer gear. It's a good read, I recommend it.

If I am reading all of this correctly, I reach the following conclusions:

(1) Jitter is more important sonically than we might have thought

(2) Better jitter reduction at the A-D side of things will yield significant benefits, which means we can look forward to another of round remasters (of analog tapes) once atomic clock solutions make it into mastering labs

(3) All of the Superclocks, claims of vanishingly low jitter, reclocking DACs -- all of this stuff that's out there now, while probably heading in the right direction, still falls fall short of what's possible and needed if we are to get the best out of digital and fully realize its promise.

(4) We can expect to see atomic clocks in our future DACs and CDPs. Really?

Am I drawing the right conclusions?
Ag insider logo xs@2xdrubin
Dazzdax, The mods I've made to my CDP that have obtained the most audible improvement are refinements to DC power into the digital section: power to master clock, but also separate discrete power circuits into DSPs and motor/servo control throughout the entire digital section. It's conceivable that some manufacturers do a better job than Esoteric to improve performance of the digital section in ways unrelated to accuracy of the master clock. But the benefits that one hears through these improvements to the digital section are still most likely related to a reduction in jitter. If not, how do I account for the audible improvements that I hear in my modded unit? I can rule out upsampling technologies as a consideration, as no changes were made in this area.

Mods to the digital section make digital sound far from awful and in most respects RBCD has surpassed vinyl in my system. My experience confirms JH's finding that short strokes related to banishing jitter really open up the true potential of digital. Problem is this may require heroic efforts like $15K clocks or 300lb. battery supplies.
Audiofeil: "I think the manufacturer in this discussion is suffering from what Freud called 'Product Envy'"

I choose to dissemintate what I hold to be knowledge at opporunities when my conscience is troubled, for I have a general disposition to side with defending any truth when I suspect disinformation being spread. This reflects a type of world view which I attempt to consciously carry. You may choose to examine further any subconscience aspects of this behavior, but please be aware that in the human science of psychology, it is by now generally known that one tends to notice upfront those aspects of others which are in truth deeply embedded in our own subconscious selves.

Liudas
The Memory Player, produced by the Nova Physics Corp. made clocking obsolete! Here's how it was explained:

"All clocking does is synchronize the laser with the DAC. Clocking synchronizes the beginning of the time the sampler is "open" for the laser to seek & read the bits. So clock & clock again & you only get the sampling period to start exactly when the laser begins reading a new section of the CD.

The problem is the bits can be read at any time during the sample period, and are read randomly. So the bit, a representation of a moment of music, is always late. Sometimes a little, sometimes intolerably late.

So clocking ever more precisely improves an area that is already nearly perfected in $200 DVD players at Walmart.

All Memory Players extract music bits as a mirror of the master. No more clocking to sync to anything, no jitter as nothing moves, only laser reading efficacy & ONLY reading music bits, hence, a mirror of the master.

As you have no error concealment bits to back up a missed bit, Memory Players must reread to capture all bits dropped in the first pass. If we used error correction bits, we're back to synthetics again so the goal is to reread more & more & faster & faster. In this way, very few bits will be lost & the ONLY bits you CAN hear, are MUSIC BITS.

It is not dependent upon a clock. All of the music bits are on memory & just stream off the memory in the order & TIME they were recorded.

The small community that is either copying the MP or designing their own now that the cat is out of the bag, know the CD player as we know it is going extinct. Good riddance. It was a poor compromise they chose in 1982. They had it nearly perfect (& perfect on CDs containing programs instead of music) but relaxed error correction to fit Furtwangler's Beethoven's 9th symphony on it & digital audio was never right again."

So who would pay $15k on a clocker that merely reduce jitter?
Rather than open yet another thread on MP(I've heard MP & yes it does sound good), I'll address the post by observing that the manufacturer's claims concerning MP theory of operation remain opaque & controversial. There has been too much delay bringing MP to market to consider it at present a serious threat to existing technology. Finally, there appear to be questions as to whether its technology is unique and patentable. The latest AA thread below addresses the controversy & also includes Gordon J. Rankin's recipe on how to build a "DIY memory player" in several easy steps. As regards music servers in general, in his review RH elevates the Esoteric with rubidium clock above HD systems like Sooloos & Qsonic. In any event with servers there is still the need for a clock at the DAC.

http://www.audioasylum.com/audio/digital/messages/13/136279.html
This is certainly a naive question, but why can't a CD player store the entire contents of a disc in memory, then send them to the DAC, which would be the equivalent of reading a file from a hard drive? Is that the definition of a music memory player? If it is, why is that controversial? Not spoken, of course, as a digital engineer.