Guys, remember we discussed the ELP laser player here? Through a contact from the manu I will go and test one with Dr. Feickert's test suite 'Adjust+' end of May.
South of France; a good opportunity to check out the TGV as well
Will report back here of course.
Jan
South of France; a good opportunity to check out the TGV as well
Will report back here of course.
Jan
Well, what I call "convincing" sound does a damn fine job of it! It is like a light switch in operation - either the system has it, or it doesn't - there is almost no middle ground, at least for me. If what I hear from another room sounds like a hifi, at any time, then it's not up to scratch ... it's a pretty simple test to use.
It's certainly not simple to make happen, but doesn't require any sort of 'balancing' to get there - it just needs the absence of any subjectively audible artifacts. IME, if one achieves that, then all the other, myriads of positive qualities all fall into place ...
It's certainly not simple to make happen, but doesn't require any sort of 'balancing' to get there - it just needs the absence of any subjectively audible artifacts. IME, if one achieves that, then all the other, myriads of positive qualities all fall into place ...
More likely your eyes......
You perceive the content of a photo with your eyes, but creating that image often involves the photographic equivalent of production, dodging burning, digital images you can use histograms etc. to evaluate the technical aspects of a photo.....
Critical high impedance nodes (there are not that many that come up) can be dealt with in the layout, the last ones I had to deal with were on some fast TI ADC,s for a quite sensitive analogue board with very high speed convertors and conversion rate.... the nodes were dealt with by clearing the copper on all other layers under the pads (SMD of course)... very hard to stand off SMD devices
No, with your brain. Eyes are used only for data acquisition.
Depending on the operating system loaded in one particular brain, the evaluation results may differ by a country mile, compared to some other brain.
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I'm used to this. And very sensible to the white balance. (photo is an other passion, I manage a forum of street photography.)
I was right, his colorimeter was not accurate in the darks. Verified.
Some learn more about a lens in viewing photos from-it than looking at MTF curves ;-)
Some lenses gives-you a better feeling of sharpness than more performing others on the paper (micro contrasts etc...) And a lot of details that we do not measure as well, like blur transitions, feeling of depth and distances etc.
My Sony A7 have a very good dynamic. Whatever i try, it is impossible to get all the nuances of sunrise colors in the high lights. Who cares about fidelity in photography?
Sony Alpha 7 et 7R - Les Photos (2)
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Where in the hell are you ever going to get 1.0 mfd between traces on a circuit board?
se
DA per se has no distortion, as Pease showed years ago simple R/C compensation of an integrating A/D could eliminate it to an arbitrary level. Unless an experiment ISOLATES DA alone the data is not useful. In this respect much of what has been published needs to be examined in a brighter light.
And yes I made JC and Walt aware that I could mathematically reproduce the DA bridge test along with the R/C model that reached a null down into the noise, for some reason this was considered unimportant just as the fact that if there is no AC voltage across a capacitor there is no distortion mechanism.
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Cyril Bateman in his Vol 9 article seems to agree:
"[...] Therefore, Dielectric Absorption does not apply to a capacitor, which is charged to a stable DC voltage. It certainly does not apply to capacitors used in traditional audio circuits, which maintain continuity of connection to both capacitor terminals and to any bias voltage used. Clearly however, should any inconsistency of connection or lack of stability of this bias voltage arise, then surprising results will be found, as the capacitor charges or discharges. This will be particularly relevant in case of over-drive, clipping and similar conditions in audio circuitry."
Jan
"[...] Therefore, Dielectric Absorption does not apply to a capacitor, which is charged to a stable DC voltage. It certainly does not apply to capacitors used in traditional audio circuits, which maintain continuity of connection to both capacitor terminals and to any bias voltage used. Clearly however, should any inconsistency of connection or lack of stability of this bias voltage arise, then surprising results will be found, as the capacitor charges or discharges. This will be particularly relevant in case of over-drive, clipping and similar conditions in audio circuitry."
Jan
Guys, remember we discussed the ELP laser player here? Through a contact from the manu I will go and test one with Dr. Feickert's test suite 'Adjust+' end of May.
South of France; a good opportunity to check out the TGV as well
Will report back here of course.
Jan
Does it work now?
I remember somewhat when the original Machine called * Finial* was said to become into the market apx 1988, everybody was keen therefor.
There was an investor group around Arne Naess ( Husband of Diana Ross was said,dont know if thats true) putting a lot of money into the project.
I have personally seen prototypes at different locations, but no listening demo.
They explained always some trouble with laser tracking, because the machine was so sensible for laser adjustment causing a big mess due missalignment while transport and so on.
There must have been lots of other trouble also, but not known to me.
Basically, what happens when it works and tracks?
What is with speed accuracy? I assume the same with usual kinds of drive.
What is with pre-distorted records ( Tracing simulator for 17um spheric styli). I have not heard , that there is a possibility to inverse the predistiorsion.
So there will be the advantage of no groove contact, thus no wear and i would assume no problem with trackability due light speed laser.
Disadvantage i assume that the laser tracks every scratch on the groove surface and every dirt/dust particle on the groove ground, where a spheric stylus never will have contact with due the very small contact surafce area of a few square micrometer per groove side, in the end this mean a record cleaning machine is mandatory.
Furthermore the ELP has a built RIAA and Line Output stage, which will have the same influence for the sonic result like any other Phonostage.
So i have no personal experience and would be glad to read abouth practical experiences or whatever.
I have also no plans to go away from my analog rig, im happy therewith.
Its just for interest.
The website says that they have over 1000 customers, so apparently it DOES work. Latest version is about $ 15k.
The thing has a laser head having 5 lasers - two to read each of the groove walls, one centering servo, one to track the record wobble and I don't remember the 5th.
Intriguing is that they claim to trace the ridges close to the top, not alfway where the cartridge has been scraping the walls, so they actually claim that they get the signal off the record as if it is new, even when it has been played a lot.
That's something I'd like to check, if possible.
Maybe I should take a worn record and see if it sounds like new
I also would like to see what the distortion, xtalk etc is of my test record with this system. If it is much better than what I see in the tests I've done so far, that's an indication that the record is better than the player. If there's not much difference it indicates that the record is the limiting factor and it isn't very useful to make better players/cartridges.
I am really looking forward to this!
Jan
The thing has a laser head having 5 lasers - two to read each of the groove walls, one centering servo, one to track the record wobble and I don't remember the 5th.
Intriguing is that they claim to trace the ridges close to the top, not alfway where the cartridge has been scraping the walls, so they actually claim that they get the signal off the record as if it is new, even when it has been played a lot.
That's something I'd like to check, if possible.
Maybe I should take a worn record and see if it sounds like new
I also would like to see what the distortion, xtalk etc is of my test record with this system. If it is much better than what I see in the tests I've done so far, that's an indication that the record is better than the player. If there's not much difference it indicates that the record is the limiting factor and it isn't very useful to make better players/cartridges.
I am really looking forward to this!
Jan
That has long been my criticism of the original DA Bogey Man article. A capacitor used in a typical audio circuit is never used in the manner in which they were measuring DA (i.e. charging it up with a voltage for a long period of time, discharging it for a short period, and then monitoring the voltage rise afterward).
It's just more "diodes in your wires," Essex Echo nonsense. It's only purpose is to freak out a bunch of neurotics so they can be sold a bunch of expensive "cures." It's a racket, plain and simple.
se
It may be a racket by the sellers, but I believe the concern of listeners is genuine.
If you are convinced that another cap in your amp sounds different, it is only natural to look for an explanation. Couple that with not fully understanding the technical issues, and - presto! a legend is born!
It is THEN that some step in to relieve the population of their spare cash.
Jan
Oh certainly. No doubt about that.
Yeah, but more often than not, it's the folks selling the "cure" that convinced the neurotics there was a "problem" to begin with. It does come from the ground up once in a while too.
se
Actually, there is a differential between charge rate and discharge rate, depending on levels and hold time. As well as the variation in direction of the given AC load at the given static condition. This tends to 'appear' similar to what a diode does... in the micro level conditions. This makes for a diode like effect, with regard to how we hear.
There's no mystery or bull here. electrons have mass, atomic structures vibrate and resonate and change orientation and shape, they are indeed elastic, as maxwell's original math allowed for and took into account.
The reason that maxwell's original works had allowance for such, is that Faraday's original works illustrated these phenomena. somehow, this all got erased..hmm how did that happen?
(Anyway, the effects are indeed miniscule and sometimes not related to the reality of what can be done and what really is an improvement in sonic presentation, a presentation that heads to a more realistic portrayal. The recent Fremer review and the Bricasti response illustrates that fairly well. The issue of removing noise and people mistaking noise removal as sounding dark, and the whole mess of issues in that area.)
You'll never find the fine details on that unless you investigate fairly deeply, and very few bother to investigate.
This situation has the tendency in human minds to turn theory into the insanity of dogma, as the mechanism, the origin, of dogma and religion... is a component of the construction of a human mind -a component of mind- which has remained unchanged since the dawn of the hominid.
It will remain that way until the given human learns to question the question, or to question the origin of the manner of thought generation in the idea of having a mind. Without such rumination of self, the given person will remain in a circularity lock of ignorance --that is unthinkingly projected upon others. Meaning, they are not really thinking and aware... and more resemble a barking dog.
This problem extends well into the arts surrounding the definition of the fundamentals of physics.
for example, to illustrate such issues and associated phenomena, I will turn to a subject that I tend to receive ridicule on, where and pouting pundits, naysayers and interventionists throw (with much vehemence) papal bulls at me for daring to mention or consider.
One of dozens, and into the low hundreds, if one actually takes a serious look. This one comes from the former 'Executive Director of Nuclear Power Corporation of India.' Which is their official arm, their government arm. I've seen more than one accredited PhD and so on, that has come from serious academic and professional background, which has done the same. You'll never find it in the mainstream press.... The gloves are coming off and it is now happening fast and furiously, which is why the panic, and thus reaction... is rising precipitously. Those who do not turn and look will die trampled with a shocked look and that crumpled scientific papal bull in their grey clutching hands.
Breaking News: Over-Unity Reactionless Generator Invented In India | Collective-Evolution
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Nothing wrong with FR4 IMO..... When Z must be very stable with temp... dimensional changes need to be minimized. This is for GHz freq. The specialized material for those mission critical circuits is a grey color.
Just thought JC might want to try it.
THx-RNMarsh
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