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Old 12th October 2017, 05:01 PM   #61
Pano is offline Pano  United States
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Quote:
Originally Posted by scott wurcer View Post
My experience with these things is that it would be good to have a single point person that they trust.
That is also my experience, and I feel will be the biggest hurdle.
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Old 12th October 2017, 07:22 PM   #62
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Interested.
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Old 13th October 2017, 08:58 AM   #63
lcsaszar is offline lcsaszar  Hungary
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Default Tracklist

I compiled the first iteration of a tracklist. Some track can be moved to side B. Disc 2 could be same @ 45 RPM. I can imagine two options: a double set with 33/45, or a single 33 only for those not interested in 45.

Please feel free to edit the tracklist. Any ideas how a vertical azimuth test could be done?

Also please read this article about cartridge tests:

Cartridge tests

Information about Ortofon and CBS test records also attached (@moderator: please remove them if it breaks copyright rules)
Attached Images
File Type: jpg CBS.jpg (1.04 MB, 180 views)
File Type: jpg Ortofon.jpg (29.3 KB, 177 views)
Attached Files
File Type: zip tracklist.zip (9.0 KB, 13 views)
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Old 13th October 2017, 11:14 AM   #64
fasterbyelan is offline fasterbyelan  United Kingdom
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Quote:
Originally Posted by lcsaszar View Post
I compiled the first iteration of a tracklist. Some track can be moved to side B. Disc 2 could be same @ 45 RPM. I can imagine two options: a double set with 33/45, or a single 33 only for those not interested in 45.

Nice one! Good to get a track list established; we now have something which we can evolve.

The double LP idea is a good one with one side at 45 rpm; those tracks that would benefit the most from the greater speed to be included here. And the idea of placing the tone for cartridge setting at the point of zero tracking error is an excellent idea.

You can count me in for a copy!
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Old 13th October 2017, 12:06 PM   #65
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We should build a track list in the clear, where it can be seen and read without a download.

Is the use of frequency stepped tones still useful in the age of computer analysis? Wouldn't sweeps do just as well?
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Old 13th October 2017, 12:33 PM   #66
Hiten is offline Hiten  India
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Does position of tests/bands matter ? I mean some tracks at the start; some at the end near the lable ? Cartridge alignment (null points) tracks is good Idea. But how to achieve it ? With a mono track of certain frequency align cartridge such that two channel are maximum out of phase ? I guess it would require single groove in continuous loop. How about lead out groove having mention of diyAudio forum ?
Regards.
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Old 13th October 2017, 12:56 PM   #67
lcsaszar is offline lcsaszar  Hungary
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Quote:
Originally Posted by Pano View Post
We should build a track list in the clear, where it can be seen and read without a download.

Is the use of frequency stepped tones still useful in the age of computer analysis? Wouldn't sweeps do just as well?
I omitted the stepped tones, here is the updated track list. It can be imported in Excel as TAB separated CSV.

Track Signal Channel Level [dBm] Time [sec] Remark
1 1 kHz L+R 0 60 reference level
2 1 kHz L 0 30 crosstalk
3 1 kHz R 0 30 crosstalk
4 no signal - - 60 rumble test
5 440 Hz L+R -6 30 normal A tone
6 20 Hz - 20 kHz log sweep L+R -10 120 frequency response
7 20 Hz - 20 kHz log sweep L -10 60 crosstalk
8 20 Hz - 20 kHz log sweep R -10 60 crosstalk
9 20 Hz - 20 kHz log sweep L+R -10 dB @ 20 Hz, -3 dB/octave 60 f.r. equal energy per octave
10 10 kHz - 50 kHz log sweep L+R -10 30 high frequency test
11 pink noise, 12 dB crest factor L+R 0 (peak) 120
12 white noise 20 Hz - 20 kHz L+R -20 120
13 Blank area - - 30 - 50 mm wide
14 3150 Hz L+R 0 60 speed stability
15 2 Hz - 40 Hz log sweep L+R -10 60 lateral cart-arm resonance
16 2 Hz - 40 Hz log sweep L-R -10 60 vertical cart-arm resonance
17 315 Hz L+R -6 10 lateral tracking
18 315 Hz L+R -3 10
19 315 Hz L+R 0 10
20 315 Hz L+R 3 10
21 315 Hz L+R 6 10
22 315 Hz L+R 9 10
23 315 Hz L+R 12 10
24 315 Hz L-R -6 10 vertical tracking
25 315 Hz L-R -3 10
26 315 Hz L-R 0 10
27 315 Hz L-R 3 10
28 315 Hz L-R 6 10
29 315 Hz L-R 9 10
30 315 Hz L-R 12 10
31 100 Hz square wave L+R -10 60
32 60 Hz + 7 kHz 4:1 L+R 0 60 IMD test
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Old 13th October 2017, 01:54 PM   #68
Pano is offline Pano  United States
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Thanks for the list.
What do we establish as the reference level for 0dB? 5cm/sec ?

There are a lot of tracking test tones listed. Are seperate tones important, or is there now a better way thru software analysis?
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Old 13th October 2017, 01:56 PM   #69
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The Ortophon Test record has a PDF guide. It should be worth a look.
https://www.ortofon.com/media/148619...user-guide.pdf
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Old 13th October 2017, 02:46 PM   #70
scott wurcer is online now scott wurcer  United States
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Quote:
Originally Posted by lcsaszar View Post
I omitted the stepped tones, here is the updated track list. It can be imported in Excel as TAB separated CSV.
Looks good so far. A couple of comments #9, not sure what equal energy per octave means for a single tone sweep except in the context of an analog tracking filter. At this time I don't think many folks would be using old school analog analysis and it is probably easily synthesized digitally anyway.

Need to decide on equalization possibilities, digital RIAA pre-emphasis would be prefered with wide band flat cutting. Needs the engineer's input.

I would like to see a single silent locked groove somewhere to play around with.

I'm sure more will turn up.
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