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Old 11th October 2017, 04:23 PM   #21
Dave Cawley is offline Dave Cawley  United Kingdom
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Would this be as good as the original DIN ones or similar to the Clearaudio ones ?

Regards

Dave
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Old 11th October 2017, 04:36 PM   #22
scott wurcer is offline scott wurcer  United States
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Quote:
Originally Posted by Pano View Post
For the speed polar plot, right?
Yes
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Old 11th October 2017, 04:41 PM   #23
scott wurcer is offline scott wurcer  United States
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Quote:
Originally Posted by anatech View Post
Isn't the standard frequency for speed and W&F test 3 KHz?

-Chris
If you check 3150 is a perfect integer common denominator at 33 1/3 rpm. There are some easily overlooked issues with interleaving the tracks with respect to both rotational and radial velocity.
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Old 11th October 2017, 05:10 PM   #24
davidsrsb is offline davidsrsb  Malaysia
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Quote:
Originally Posted by scott wurcer View Post
If you check 3150 is a perfect integer common denominator at 33 1/3 rpm...
I was wondering why my test record used that one.

How about a noise track or sweep with a linear frequency response before RIAA equalisation, to allow direct cartridge measurement without equalisation errors?
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Old 11th October 2017, 05:24 PM   #25
Pano is offline Pano  United States
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I was also wondering about equalized vs not, but that should be discussed with the mastering house. Since they are the ones normally applying the equalization, they would know how easy it is for them to leave it out.

We (Scott) could apply a perfect RIAA curve to the files before they are sent to mastering, but would that mess up their signal flow?
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Old 11th October 2017, 05:39 PM   #26
kevinkr is offline kevinkr  United States
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Not sure about that, most cutting heads do not have flat frequency response and use EQ in addition to the RIAA cutting EQ to flatten out their frequency response or more correctly perhaps bring the overall system response into conformance with the RIAA cutting requirements. More likely you would want a mastering house that could tell you what their conformance to the standard actually is, and select on that basis.
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Old 11th October 2017, 05:55 PM   #27
scott wurcer is offline scott wurcer  United States
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Quote:
Originally Posted by davidsrsb View Post
How about a noise track or sweep with a linear frequency response before RIAA equalisation, to allow direct cartridge measurement without equalisation errors?
Yes, there would be value in asking for the RIAA to be turned off and providing an exact RIAA digitally. I know there are things that have to be corrected in the mastering lathe but I still think in lower audio BW's this is a better solution.

As for high frequencies the STR120 claims 50kHz response and it's a legacy test LP. They must be able to do this now.
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Old 11th October 2017, 07:20 PM   #28
Pano is offline Pano  United States
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Indeed. Does the cutting master apply RIAA and cutter head EQ separately, or are they bundled together? Another question for the mastering house.
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Old 11th October 2017, 08:15 PM   #29
cbdb is offline cbdb  Canada
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May as well put square wave and impulses on the record. You'll have 20 minutes. You could even repeats everything at -20db or other level to check dynamics.
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Old 11th October 2017, 09:51 PM   #30
Pano is offline Pano  United States
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Or 15 minutes if we keep a nice, wide groove spacing.
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