John Curl's Blowtorch preamplifier part III

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Sorry more rot. You really need to spend less time posting and more time researching or asking the right questions.
Really?

I think you should first read what i say and compare with your own system set-up...You don't have the same set-up as most of us, having separate turntables , tonearms, preamps and cartridges so you cannot draw a conclusion on the same system the same way.

I already explained everything it is to explain.
I am not wrong .In this subject on this particular problem, you're wrong.
 
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@scottjoplin,

i´m still interested in your answer to my question:

"There is always real money at stake but who knows, so please tell me which way these people can get their expert status if not by predictable results and customer´s satisfaction?"
I don't know, hence my question ;) The predictable results sounds reasonable depending on how you measure results, I hope it's not customer satisfaction for the reason I outlined, I presume you understand my reservations about that?
 
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You know very little about the ways I can configure my system. However your continued fingers in ear attitude indicates you have no wish or intention to allow new ideas into your head for consideration. I shall save my time in the future.


I didn't make too much noise in the last 7 years since i started to build phono preamps .
Were you curious to build this thing?
YouTube
Vinyl Turntable Equipment: DIY tangential tonearm
I was.
You want to teach me more about your expensive set-up and what all the people that are in control of this high end media are telling about 3000 dollars tonearms too?
Go ahead!

I can tell you that this is the best tonearm you could ever have .How do i prove it in a statistical analyses done on only one system though?


Well...the water "knows" that the Earh is Flat :) Of course i'm not a flat earth guy, but you understand what i'm saying.
Apart from that, the friction system on a water slide...can't be beaten by oil or other grease mechanism.Simple physics.
Yet there is a single mechanical friction spot on that tonearm and for that i got a rolling mechanism from a video tape machine, but the whole theoretical model can show that it's much more advanced than any solid mechanical model on the market no matter the price.It costs me less than 20 pounds to build one .
It's just the inconvenience of dealing with a system done on water...
 

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What would be the absolute lowest level of a noise we can possibly hear at our best ?

Hearing is not linear (in the sense of time-invariance). Threshold of hearing in audiology testing is done with single tones in isolation.

When people hear small aberrations in music, the level of the music itself is much higher than the threshold of hearing.

Two very different situations. There is no basis for assuming one result can be applied to the other in a linear fashion.
 
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It's a bit higher, but the signal to noise ratio should also be higher.
Philips proposed in the 90's video reading attached to an AI neural model to read the information and remove the noise.Actually it's reading one single detailed 3d photograph of the whole vinyl.Today it can be done perfectly.You just clean the vinyl, make a photo of it with a high resolution camera, probably a stereo one, transfer to your computer and it's going to play the photo.
The ELP laser system is an expired Phillips patent too...The Japanese bought the patent before it expired, i think.
 
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I'ts a bit higher ...
Actually it's reading one single detailed 3d photograph of the whole vinyl
Why Higher ? Optical = no friction noise.

While the vinyl, and not the mother master, closer from the original, and, because metallic, not subject to electrostatic dust problems ?
Restauration has to be made by the record companies that keep both the master tapes and the original father and mothers vinyl masters: A cultural duty.
 
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...
Restauration has to be made by the record companies that keep both the master tapes and the original father and mothers vinyl masters: A cultural duty.

Except when they loose or damage them... It happens more often than you think. :(

Also, there's the extreme case of the Direct-to-Disk records: I still own 1 well worn and 1 brand new sealed copies of the famed Sheffield "I've Got The Music In Me". I'm still trying to figure out what to do with the pristine copy.

Any idea?
 
Also, there's the extreme case of the Direct-to-Disk records: I still own 1 well worn and 1 brand new sealed copies of the famed Sheffield "I've Got The Music In Me". I'm still trying to figure out what to do with the pristine copy.
Direct to disk is just a way to avoid the magnetic tape hiss and added distortion. The mother master still existed.
You could take contact with the owner of the label if he is interested in an other source for digital restauration ?
 
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The original inventor was a customer, I don't think it was any large company. It has plenty of problems with dust too.
Indeed...I remembered some untrue stories i thought i have read a while ago:
Laser turntable - Wikipedia
Yet, to quote somebody, "No laser ever moved a single dust particle! " , just a diamond tip with the right velocity and friction :)
 
@Evenharmonics,


Aczel wrote:
"Since sheer guessing will yield the correct answer 50% of the time, a minimum of 12 trials is needed for statistical validity (16 is better,20 better yet)."

Statistical validity is given if a test really measures what it is intended to measure.
As an ABX test is a test for difference (audible difference in our case), a specific ABX test is statistically valid if it _really_ measures if a difference is audible.

If so, then obviously it does not depend on the number of trials.
If it does not measure what it should additional trials do not help.

Therefore Aczel´s statement was nonsense.
His statement being nonsense is your opinion, a biased one. After all, you go around the forums trying to shill for your audio business and P. A.'s statements get in the way so you smear his statements. It's an old tactic.

Which is also completely nonsense, but as you refuse to educate yourself on the complex topic of sensory testing, i can´t help.
(It´s the old horse, water drink problem)
The information is out there, good literature for reading up was cited several times, so just do it; learning something does not harm and you would stop fooling yourself so often......
Thank you for confirming my suspicion once again. You don't have a proof of what I mentioned.
 
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High Performance Loudspeakers - Optimising High Fidelity Loudspeaker Systems, 7th Edition | The Absolute Sound


The review seems better than the book. by Robert Greene (PHd math prof at UCLA - retired).


THx-RNMarsh
I think that the loudspeakers of the future will be sold by the gallon and spread like a paint on the walls, being made out of resonating crystals immersed into a viscous liquid made out of an organic conductive material connected to a dc current source and pumped by light.
 
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