Well, for that paper. Haven't read a lot of what's out there, but it seems the latest changes were around 1971, but those are based on existing DIN and IEC.
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Fun with vinyl measurements
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I recorded my Denon 51F with peak wow below 0.03 or so , and compared listening to A digital 3150 tone, ( Edited both samples to a loop file)the warble/ dizziness was quite noticable,but without the reference it was little to complain about .Music sounds just fine
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I read somdwhere that 2Sigma is the new standard, DIN and JIS WRMS hide all the problems behind a smaller number. So 2S correlate much better with the actual speed variation/quality , se myposted plots..
Previous weren't to correlate to actual speed, rather perception.
Yes WRMS always give the smallest number, but then there is quasi-peak and unweighted RMS and unweighted peak (the two last give higher numbers than 2sigma, not sure about quasi-peak). The confusion is out there still since you often do not know what the manufacturer refers to. Are all the numbers of current turntables given as 2sigma? Or to old standards?
morillon
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2-sigma aes, from personal experience, remains discriminating at 0.0x% when the others are less so except to consider at 0.00x%...(which I would not agree with for my part)... but would be delighted to read the feedback on this subject...
(me just for use in settings and optimization etc)
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Few use 2S since the value is larger…
morillon
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there are the flattering numbers... and what are useful ..... ;-)
And none of these numbers are seen in dynamic conditions.
Billie Jean dance
many others have quite a steep filter in the bass Good point. Just looked at my waxwing settings. Derumble filter is on which sets
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morillon
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I don't have this disc and streaming or CD will be enough for me in this case... ;-)
(These standard wf mesureaments were very useful to me... allowed me to audibly improve a suspended belt... coming from a large dd, otherwise I would have had to put it in the attic... ;-) it turned out, the 2-sigma in particular, is significant for my use... the wf was-is really a priority for me... not you? )
(These standard wf mesureaments were very useful to me... allowed me to audibly improve a suspended belt... coming from a large dd, otherwise I would have had to put it in the attic... ;-) it turned out, the 2-sigma in particular, is significant for my use... the wf was-is really a priority for me... not you? )
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Well this particular record just shows the effect more clearly, but all records and conventional tonearms have it, more or less. If it has a resonance, it has scrubbing and FM modulation in the resonance region that varies dynamically (independent of drive stability). The servo-controlled damping arms would be interesting.
Don't listen to records on FM!
I don’t mean FM radio, I mean FM as in Frequency Modulation Distortion (FMD, or pitch instability). FM occurs as a result of the stylus tip scrubbing along the groove during tonearm mass/compliance resonance or transient events. The amount of scrubbing depends on the amplitude of the resonance...
morillon
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I accept the relative aspect of the "vinyl" measurements on principle .... and if I have already come across vinyls that pose problems, pressing etc. and that excite harmonic modes on the arm side, perhaps creating too many reading problems, I have put them aside ... overall over the years it has not bothered me so much as the evidence of problems with good old bad w&f ... after that I have certainly had over the years rather coherent turntables-arms-cartdrige that do not attract too much lightning ;-)Well this particular record just shows the effect more clearly, but all records and conventional tonearms have it, more or less. If it has a resonance, it has scrubbing and FM modulation in the resonance region that varies dynamically (independent of drive stability). The servo-controlled damping arms would be interesting.
Don't listen to records on FM!
I don’t mean FM radio, I mean FM as in Frequency Modulation Distortion (FMD, or pitch instability). FM occurs as a result of the stylus tip scrubbing along the groove during tonearm mass/compliance resonance or transient events. The amount of scrubbing depends on the amplitude of the resonance...www.diyaudio.com
ps we must always not forget the orders of magnitude in our "concerns" ;-)
as a reminder with the wf... the other real subject, because it concerns the same relationship to the musical signal and not an extreme or particular case (a sweep at 12db is a particular case etc), it is the subject of the anti-skating adjustment... fundamentally insoluble on the pivot tonearms and this in significant proportions... ... always this story of the orders of magnitude in the problems
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When you think you have leveled your Gyro. you have not. When the motor runs the belt drag increases and shifts the leveling
Making it perfect level accodring to this bubble level makes is worse, I think what I have now is good enough...it is at DD level...
Sadly slow-motion does not work when file is uploaded
Making it perfect level accodring to this bubble level makes is worse, I think what I have now is good enough...it is at DD level...
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morillon
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interesting, especially since the gyro, in my memory, has a rather flexible suspension .... ;-)When you think you have leveled your Gyro. you have not. When the motor runs the belt drag increases and shifts the leveling
Sadly slow-motion does not work when file is uploaded
Making it perfect level accodring to this bubble level makes is worse, I think what I have now is good enough...it is at DD level...
View attachment 384578
perhaps a fine adjustment of the suspension taking into account this effort in use is possible?
("dysemetric" when not in use) ...
ps I forgot.. what engine is this version of gyro?
in any case the efforts and precautions etc are effective (2-sigma?)
(it also shows the limit of measurements via telephone etc and degraded results, on flexible suspensions or low tolerance manufacturing machines...and the total dysemetry due to the mass of the telephone and its distribution etc...)
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Good way to approach vinyl (a format that comes with limitations)
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Shows the DIFFERENCE of the AudioTechnica VM760SLC and Ortofon 2M Bronze.
The typical AT resonance peak is obvious when compared with 2M that has a later rise/peaking at 20k+
That's a pretty standard rule of thumb for all the higher end AT MM's !
morillon
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indeed...;-)
the AT being particularly demanding on this point (see empirically to place itself at the top of the recommended VTF range, it is tried in any case subjectively,(the end result))
The common place for many about AT (more than ellipic) is to find if not to provide care, the at certainly alive but possibly a little thin and """pointy"""
;-)
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