|
Audio Asylum Thread Printer Get a view of an entire thread on one page |
For Sale Ads |
174.238.15.36
In Reply to: RE: 33.1 to 33.3 Audible? posted by kitch29 on January 13, 2017 at 04:31:24
The road runner is showing 33.333 as perfect. So if I read this correcty John is seeing 33.330-33.336. Then the question arises how chose where all the albums made to that 33.333 number???
Enjoy the ride
Tom
Follow Ups:
I'm not sure why that question would arise, but its my impression that cutting lathes are direct-drive and exceedingly accurate. They are probably quartz locked direct-drive like my Technics SL-1200 turntable. I measured its average rotational speed to be accurate to 0.0008% at 33.333-rpm. This equates to an accuracy of 0.0003-rpm, which is one-tenth the error of my Sota Millennia turntable with its new motor.Best regards,
John Elison
Edits: 01/13/17
My point was 33.1 is a far cry from 33.330 and to think the music business was that concerned about .003 rpm to keep constant tabs on it would surprise me!!!
Regardless of all the quessing I bet that sota platter loves being hooked to a high quality 3 phase brushless DC motor.
Seeing you have direct drive table and the new sota combo maybe if Bill has a extra pick up you could throw one on the techniques and see if the road runner stays at 33.333. That would be interesting from the wow angle but still not answer can anyone hear a pitch difference of .003.
Enjoy the ride
Tom
The RoadRunner does not measure wow & flutter. Originally, it did seem to measure wow & flutter, but Bill rewrote the software to incorporate an averaging algorithm to eliminating wow & flutter from affecting its reading. Therefore, if I connected it to my Technics SL-1200, it would not drift at all. It might fluctuate slightly like it does on my Sota, but it would always remain centered on 33.333-rpm.
Best regards,
John Elison
Having bought an extra sensor and installed it on my SL1200MK2, I can attest that you are 100% correct. The Technics locks at 33.333 and stays there. I still have the sensor, but have not tried to install it on my SL1200G. The result would be expected to be the same, though.
Did it fluctuate at all or did it actually lock on to 33.333 and stay there?
No fluctuation on the SL1200MK2 for all practical purposes. My Prime fluctuates but not frequently (perhaps once every 10-15 seconds) and not by more than 0.001-0.003 all to the plus. This is not audible.
Post a Followup:
FAQ |
Post a Message! |
Forgot Password? |
|
||||||||||||||
|
This post is made possible by the generous support of people like you and our sponsors: