Stylus-Drag..Fact or Fiction?


Most audiophiles can't seem to believe that a tiny stylus tracking the record groove on a heavy platter could possibly 'slow-down' the rotating speed of a turntable.
I must admit that proving this 'visually' or scientifically has been somewhat difficult until Sutherland brought out the Timeline.
The Timeline sits over the spindle of the rotating disc and flashes a laser signal at precisely the correct timing for either 33.33rpm or 45rpm.
By projecting these 'flashes' onto a nearby wall (with a marker attached)....one can visualise in real-time, whether the platter is 'speed-perfect' (hitting the mark at every revolution), losing speed (moving to the left of the mark) or gaining speed (moving to the right of the mark).

RAVEN BELT-DRIVE TT vs TIMELINE 
Watch here how the laser hits the mark each revolution until the stylus hits the groove and it instantly starts losing speed (moving to the left).
You can track its movement once it leaves the wall by seeing it on the Copperhead Tonearm.
Watch how it then speeds up when the tonearms are removed one by one....and then again, loses speed as the arms are dropped.

RAVEN BELT-DRIVE TT vs TIMELINE
Watch here how the laser is 'spot-on' each revolution with a single stylus in the groove and then loses speed as each additional stylus is added.
Then observe how....with NO styli in the groove.....the speed increases with each revolution (laser moves to the right) until it 'hits' the mark and then continues moving to the right until it has passed the mark.

Here is the 35 year-old Direct Drive Victor TT-81 turntable (with Bi-Directional Servo Control) undergoing the same examination:-
VICTOR TT-81 DD TT vs TIMELINE 
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Dear @jtimothya  :  """  Dynamic transients have more initial impact with a more speed accurate table - less blur at the launch edge. ""

Yes, that's one of the reasons about, other is that any kind of vibrations generated by the analog rig are better damped/controled.Transient accuracy and speed is where the sound of music strats followed by the developed harmonics. It's the " engine " of music reproduction in home.

@mikelavigne  said: """  the Saskia has amazing energy, images more holographic and astonishing tonal density. more weight and impact to the bass... """

that comes from that transient accuracy/speed and very good controled vibrations throug the analog rig.

In the other side I don't think that differences in betweeen the Saskia and NVS TTs been really high but only differences on some important characterisrtics of the performance that goes more with Mike priorities but this is only my " imagination " because ML is a true expert audiophile and music lover and he knows.

R.
Thanx for the description lewm. I would really like to hear the Monaco table. I could do it if I sold one of my tables.
jtimothya, yes we are very sensitive to timing but not in that way. We are sensitive to the time and volume differential between our ears. We are much more insensitive to pitch and tempo. Many musicians use various devices to tune their instruments and metronomes to set tempo. 
Flutter is more audible than Wow. It is generally accepted that most of us can not here tempo and pitch variations less than 0.25%. Modern high performance turntables when new have wow and flutter levels less than 0.05% well inaudible by any of us. Relating values below this to some alteration in sound quality is difficult if not impossible. Then end result is that any body can say whatever they want. Which unfortunately means whatever anybody says is worthless without some form of scientific proof. 
yes we are very sensitive to timing but not in that way. We are sensitive to the time and volume differential between our ears. We are much more insensitive to pitch and tempo. Many musicians use various devices to tune their instruments and metronomes to set tempo.

Didn't think it needed saying, my account presumes listeners with two ears.

More insensitive (less sensitive) to pitch and tempo ... than what?  Time and volume differentials?  You mean frequency and amplitude differentials?  Pitch is simply ordering sounds on a scale - that scale is frequency. Tempo is pace or speed, impossible without time.  At the stylus groove interface, the cartridge provides amplitude, the table provides frequency.

The conductor is the orchestra's clock.

"ignore the technology and measurements.

i did......or i do every day."



I never understood this position.  While the sound produced by a component might be the only thing that matters to some people, perception is highly subjective and dependent on many external factors (mood, daily hearing condition, type of music, room acoustics, blood alcohol content, etc.).  It is also personal to the individual and not easily or accurately reproducible or even communicated to others.

To ignore science and technology when designing audio components is wrought with peril, and makes you a hobbyist, not a designer.  Design decisions should be informed by established theory and practice, and the actual sonic results (and measurements) should confirm those choices and correlate with the design theories.  The more connections between the two realms (rules of correspondence), the more certain you can be that the sonic results are accurate and not due to some subjective factor, bias or confusion of the senses.

Measurements are used by manufacturers in their specifications and marketing materials to promote their products as "better" than the competition.  Verification of these measurements prevents mfrs from making outlandish or misleading statements about their products and serves to protect consumers.
I never understood this position.

especially if you take it out of context. and then twist it around.

this is a forum for listeners. my whole point, not the 5-10 percent you lifted, was that we have to listen to what these turntables do without preconceived notions about what we might expect. what does this tt actually do? and then i went on the relate what i heard from each turntable.

obviously i invested significant dollars to enjoy these turntables (supporting guys like you) partly because of my view of their technology and execution. i’m not blind to it. but there is a point where you listen objectively and let the music speak. i’m never going to be someone who has to first agree with and understand the technology and whether it fits what my engineering prof told me. others need this and i say knock yourself out with it.

but for me the technology only interests me only up to a point.

measurements are important. and i do agree there is a relationship with turntable performance between measurements and performance. but no matter the measurements the final arbiter is our ears. i want to know what people heard from their turntable. that is where the proof is.

i was one of the first ones to order the AS-2000 from David Karmeli that you were involved with, but i later changed my mind. i heard his AS-1000 at his home. sure, i appreciated the technical merits of it, but then cleared my mind to hear it on it’s own merits. it was awesome sounding for sure. what was significant to me was the other four turntables David had sitting there that i also heard and how the AS-1000 compared. not the tech.

i have read your posts here with genuine interest; of course at a particular point it goes completely over my head. i appreciate your participation on this thread. and i do care about the technology and especially observe the degrees of apparent execution of various turntables. but mostly i listen and follow my ears.

if you limit your customers to the ones who truly understand and can converse in the technology you work with that would seem to be a bit self destructing. but good luck with it. you might consider being more understanding of those who don't need to know everything.