Fun with vinyl measurements

[Balle Clorin]

Channels can and usually have inherent imbalance at 100% perfect azimuth, so attempting to get 100% balance by adjusting azimuth may lead you astray.

I use Ortofon test record and adjust Azimuth to get low and equal crosstalk with 1kHz L and R.
I do that with flat Eq and 400hz high pass filter to remove low frequency rubbish

 

[Quando]

What is the name of cartridge and arm/TT

It doesn't matter, because it was just an example, that in RightMark you can see nicely what resonance looks like in the range of up to 20 Hz.
The only problem is, as I think, maybe I'm wrong, that you have to refer the measured amplitude to something, compare, because the inserts generate different sound levels, and you can also record the sample itself, louder or quieter, into the computer.
I understand it this way, that in Audacity I first measure the RMS of the sample, and then I check in Audacity what the peak amplitude of the unwanted resonance is.
I subtract, I know how high the amplitude is in relation to the RMS of the sample.

 

[Balle Clorin]

I am curious, why can’t you tell the TT and cartridge name,? it could be useful for others..

 

[Quando]

I am curious, why can’t you tell the TT and cartridge name,? it could be useful for others..

This is a completely random measurement.

 

[markstein]

Channels can and usually have inherent imbalance at 100% perfect azimuth, so attempting to get 100% balance by adjusting azimuth may lead you astray.

I use Ortofon test record and adjust Azimuth to get low and equal crosstalk with 1kHz L and R.
I do that with flat Eq and 400hz high pass filter to remove low frequency rubbish

Just to be precise: I am not trying to adjust so that channel imbalance is zero but so that channel imbalance remains constant between mono signal and out-of-phase signal @1kHz. I then correct for the imbalance in my playback chain.

This check can be conveniently done with the demo (free) version of ARTA.

I am using this test record: https://www.amazon.de/Vinyl-Check-New-signals-recordings-eqipment/dp/B00INIA8PI

Doing your approach would require me to get the REW pro license to measure both channels simultaneously. Good reason to financially support this great software

 

[Balle Clorin]

This is a completely random measurement.

So what? Still interested to know which Cartridge and TT.

 

[Balle Clorin]

Just to be precise: I am not trying to adjust so that channel imbalance is zero but so that channel imbalance remains constant between mono signal and out-of-phase signal @1kHz. I then correct for the imbalance in my playback chain.

This check can be conveniently done with the demo (free) version of ARTA.

I am using this test record: https://www.amazon.de/Vinyl-Check-New-signals-recordings-eqipment/dp/B00INIA8PI

Doing your approach would require me to get the REW pro license to measure both channels simultaneously. Good reason to financially support this great software

Not need to get PRO at all. REW is free, just import a 2channel wave file recording. . And I do not need use REW for this at all, a multimeter at the RIAA output will do. But a high rumble or resonance can disturb the reading
With Parks Audio Puffin /Waxwing the Azimuth function can be used to show dB separation, is works as I described

Upening a resonance track file Denon XG-700o? test record 4-100Hz, Denon 51F shure V15 IV Jicos SAS B

Below SME V + AT OC9MLii Toshibe 1kHz reference tone L and R , LF-90001 test record, surprisingly low res peak is 10.6 hz, while resonence test track shows 8-9 Hz. Recordes without RIAA EQ

 

[markstein]

Not need to get PRO at all. REW is free, just import a 2channel wave file recording. . And I do not need use REW for this at all, a multimeter at the RIAA output will do. But a high rumble or resonance can disturb the reading
With Parks Audio Puffin /Waxwing the Azimuth function can be used to show dB separation, is works as I described

Okay, don't know the Waxwing (yet). Then I probably could as well use my mic preamp (UFX II) level meter and apply a high pass @400Hz. Will try that. Thanks

 

[MaxwellsEq]

This is a completely random measurement.

In my opinion, do not prioritize amplitude as you seem to be doing. I would prioritize frequency (aim for higher). Obviously if the result is an out of control resonance, that's not great, but if there were two results, one at 10Hz that's 3dB lower than one at 15Hz, I'd probably still pick the higher frequency just to keep everything away from 4Hz. I'd then damp the arm+cartridge and use a filter in the preamplifier below 30Hz.

 

[Quando]

In my opinion, do not prioritize amplitude as you seem to be doing. I would prioritize frequency (aim for higher). Obviously if the result is an out of control resonance, that's not great, but if there were two results, one at 10Hz that's 3dB lower than one at 15Hz, I'd probably still pick the higher frequency just to keep everything away from 4Hz. I'd then damp the arm+cartridge and use a filter in the preamplifier below 30Hz.

 

[Quando]

Please look carefully at the relationships, effective mass, compliance, resonance frequency. Carefully.

 

[MaxwellsEq]

Please look carefully at the relationships, effective mass, compliance, resonance frequency. Carefully.View attachment 398088

Are you an expert?

 

[Quando]

Are you an expert?

My knowledge allows me to assess that when someone writes that it is better to choose a resonant frequency at which the resonance amplitude will be higher, it means that, PROBABLY, they do not know what they are writing about. If someone jumps with examples from a frequency of 10 Hz to 15 Hz, that it was as far from 4 Hz as possible, they CERTAINLY do not know what they are writing about.

 

[USER]

My ignore list has a new member.

 

[Balle Clorin]

How do I ignore?

 

[USER]

Hover over the name on the left side and click the ignore button.

 

[MaxwellsEq]

My knowledge allows me to assess that when someone writes that it is better to choose a resonant frequency at which the resonance amplitude will be higher, it means that, PROBABLY, they do not know what they are writing about. If someone jumps with examples from a frequency of 10 Hz to 15 Hz, that it was as far from 4 Hz as possible, they CERTAINLY do not know what they are writing about.

I was an engineer working in studios when there were at least a couple of turntables per studio. I had to set them up and regularly measure them, resolving issues such as distortion and high wow and flutter. Reliable behaviour was key.

And you?

 

[Quando]

I was an engineer working in studios when there were at least a couple of turntables per studio. I had to set them up and regularly measure them, resolving issues such as distortion and high wow and flutter. Reliable behaviour was key.

And you?

I'm very sorry, but I will not discuss this topic with you.

 

[JP]

The way you’re going you’ll be talking to yourself pretty soon.

 

[Timmy]

I will not discuss this topic with you.

Quando, you have to understand the one Golden Rule with this community:

Don’t mess with »Forum Donors«

That’s not so hard to grasp, is it?