Obviously photo was ok, admins did not react, besides internet is full of such photos.
But back to subject, sorry I was happy and wanted to share concert experience.
@ Hans, here is 1khz I recorded from Ortofon LP. It is recorded in Audacy with 192 kHz setting, saved as wav 32 bit floating as windows let me. Please see if it is ok for you to import and let me know.
It is zip as our site does not allow .wav files. I also made sweep but for moment couldnt send as it is too big for the site. Pls see if this works, if ok, the rest I will record in 44.1/16 to reduce size.
Thanks!
But back to subject, sorry I was happy and wanted to share concert experience.
@ Hans, here is 1khz I recorded from Ortofon LP. It is recorded in Audacy with 192 kHz setting, saved as wav 32 bit floating as windows let me. Please see if it is ok for you to import and let me know.
It is zip as our site does not allow .wav files. I also made sweep but for moment couldnt send as it is too big for the site. Pls see if this works, if ok, the rest I will record in 44.1/16 to reduce size.
Thanks!
Drbulj,
Thx for sending a sweep file.
1) Are you sure the 1/48 octave flattening is completely switched off ?
Reason I ask is because your spectrum goes all the way up to 60Khz, which IMO is impossible for a test signal supposed to be stopping at 50Khz.
2) Could you make a single .wav file in one go all the way from track 1 to 4 even when you can't record in stereo.
3) To make a THD plot of your cart at 1Khz@5cm/sec, a second .wav file from track 5 would be interesting.
Hans
Thx for sending a sweep file.
1) Are you sure the 1/48 octave flattening is completely switched off ?
Reason I ask is because your spectrum goes all the way up to 60Khz, which IMO is impossible for a test signal supposed to be stopping at 50Khz.
2) Could you make a single .wav file in one go all the way from track 1 to 4 even when you can't record in stereo.
3) To make a THD plot of your cart at 1Khz@5cm/sec, a second .wav file from track 5 would be interesting.
Hans
Dear Hans,
First, thank you so much for all your time, it is great help!
I just sent you 2 files as requested. For these recordings Im not using REW at all, but recording directly to Audacy without REW. Also with REW i removed octave and set spectrum, in post #436 there is picture of spectrum of sweep created digitaly by soundcard, bins are easily visible and they are in equal frequency pots.
I have no idea why my record has higher slope, I am 100% sure that this is nothing to do with preamp, cart or recording as otherwise this would be very observable with music, and it is not... Only thing I can think off is that Ortofon changed something, even less and less I see the purpose of this test LP...
First, thank you so much for all your time, it is great help!
I just sent you 2 files as requested. For these recordings Im not using REW at all, but recording directly to Audacy without REW. Also with REW i removed octave and set spectrum, in post #436 there is picture of spectrum of sweep created digitaly by soundcard, bins are easily visible and they are in equal frequency pots.
I have no idea why my record has higher slope, I am 100% sure that this is nothing to do with preamp, cart or recording as otherwise this would be very observable with music, and it is not... Only thing I can think off is that Ortofon changed something, even less and less I see the purpose of this test LP...
Sorry, one more thing. For some reason Audacy records are much reduced in volume after exporting (in contrary to hardware measured VRMS and Audacy peak meter while recording)). For last 2 files I increased gain on card input by 10db so it is easier to watch details.
Again me dear Hans, this time about overload limit of first amp stage.
I just sent you also recording of Laurie Anderson talkshow, quite dynamic song especially in HF region, before RIAA. On Audacy screen I can see clipping points on many places, but that is soundcard limitations with its single +9V PS. The preamp with +-18V supply should have no clipping, even I cannot record these dynamics due to recording equipment limits....
I just sent you also recording of Laurie Anderson talkshow, quite dynamic song especially in HF region, before RIAA. On Audacy screen I can see clipping points on many places, but that is soundcard limitations with its single +9V PS. The preamp with +-18V supply should have no clipping, even I cannot record these dynamics due to recording equipment limits....
What puzzles me also is that when looking in Audacity to your 1Khz recording, is that the upper halve of the sine wave has a lot of "grass" that frequently even clips.
This has nothing to do with FFT setting or filtering, but it could be that your anti skating is not set correctly.
It may also affect the measured distortion, so better not to add the extra 10dB.
Hans
P.S. the -35dB H2 before Riaa makes sense, because Riaa is almost flat between 1KJhz and 2Khz.
This has nothing to do with FFT setting or filtering, but it could be that your anti skating is not set correctly.
It may also affect the measured distortion, so better not to add the extra 10dB.
Hans
P.S. the -35dB H2 before Riaa makes sense, because Riaa is almost flat between 1KJhz and 2Khz.
Attachments
Just another observation.
Your cart is supposed to produce 0.3mV at 1Khz@5cm/sec, right ?
The preamp you use has a gain of 60dB to which you mention to have added another 10dB, in total 70dB gain.
This would result in a 1kHz sinewave at 0.95Volt or -0.5dB.
However in your plot the peak is at -6.5dB ??
Hans
Your cart is supposed to produce 0.3mV at 1Khz@5cm/sec, right ?
The preamp you use has a gain of 60dB to which you mention to have added another 10dB, in total 70dB gain.
This would result in a 1kHz sinewave at 0.95Volt or -0.5dB.
However in your plot the peak is at -6.5dB ??
Hans
And also the sweep signal doesn't look that nice.
What you can see is that the signal in time does not have a constant amplitude as it should have up to ca 40Khz.
This fully explains why the FFT does not have a -10dB/dec slope.
As a reference I include a plot how the signal looks from 2Khz to 50Khz on my system.
Hans
P.S. I have just added your time signal zoomed out from 2Khz to 50Khz
What you can see is that the signal in time does not have a constant amplitude as it should have up to ca 40Khz.
This fully explains why the FFT does not have a -10dB/dec slope.
As a reference I include a plot how the signal looks from 2Khz to 50Khz on my system.
Hans
P.S. I have just added your time signal zoomed out from 2Khz to 50Khz
Attachments
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Hi, so good to sit at desks at the same time.
Antiskating seems not to be reason for grass, here is picture, from top to bottom: no antiskate, antiskate low, high and max
O.k. Anti Skating does not effect the signal in any way.
Is the surface of your LP exactly horizontal while playing ?
Hans
Is the surface of your LP exactly horizontal while playing ?
Hans
I quick and rough aligned level, definitely changed it... This is not related to that, below "new level" max and no antiskate....
Not quickly. In house I have sumiko blue point, not used for decades and damaged cantilever a bit (gf's cleaning rag 🙂) Friend has ZXY exceed bloom, but that will take weeks to negotiate...
Hi, Ruby II is specified at 0.3 mV @ 1kHz @ 3.54 cm/s, Dont know how to translate that to 5cm/s
My preamp uses 2 x 60db, so 66db. When I apply 0.35 mV from soundcard, I get out approx 700mV, this works.
Here I post 1kHz chart on ortofon amplified 60db by RME mic amp. Or my chart is half dead (doesn't seems as when playing music it is all ok) or this LP is reject... or I don't know yet 🤔