Accuracy

Ron Resnick

Site Co-Owner, Administrator
Jan 25, 2015
5,052
29
48
Beverly Hills, CA
#21
. . .

Vinyl playback is such a complex process that most of the time it is not possible to create general rules. In the end we have good and poor implementations of each technique.
+1
 
May 30, 2010
13,959
39
48
Portugal
#22
Nothing miraculous and what exactly, am I not understanding? Your device works (maybe) and mine works...I paid more, so what? I could build the device you have shown no problem...done much more compllicated things than that in my life...both in audio and in the lab.
In terms of detecting speed drag Speednic does exactly the same as my 3 euro LED lighting lamp connected to the mains. The sensitivity of a strobe is a function of the number of strobe marks, not of the device illuminating it. The .001% accuracy is meaningless.

And yes my two points were "Accuracy to more than .1% in vinyl sound reproduction is meaningless" and "small speed variation measured with a strobe when the stylus is lowered do not correlate with sound quality and should not be used for this purpose". All else was due to the fun name and exorbitant price of your device.

BTW, I also check speed variations and fluctuations using a 3150 Hz test LP connected to a spectrometer. Analog people have a point, no more instrumental fun with the Vivaldi ... :eek:
 

morricab

Active Member
Apr 25, 2014
2,302
8
38
Switzerland
#24
In terms of detecting speed drag Speednic does exactly the same as my 3 euro LED lighting lamp connected to the mains. The sensitivity of a strobe is a function of the number of strobe marks, not of the device illuminating it. The .001% accuracy is meaningless.

And yes my two points were "Accuracy to more than .1% in vinyl sound reproduction is meaningless" and "small speed variation measured with a strobe when the stylus is lowered do not correlate with sound quality and should not be used for this purpose". All else was due to the fun name and exorbitant price of your device.

BTW, I also check speed variations and fluctuations using a 3150 Hz test LP connected to a spectrometer. Analog people have a point, no more instrumental fun with the Vivaldi ... :eek:
More speculation from you about the measurement accuracy/precision between your cheap and my not as cheap solution. What does price have to do with it anyway?

It has a lot to do with how accurately the strobe disk is made and the evenness of the gaps between lines .

You don't know yours is equivalent.
 

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