Yes it is not but I am talking about the begniing ans ends. The one below is not correct. I will redo the alignment with pictures of headshell/cart along with it.
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Frequency Response Test Records
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I have received the Clearaudio TRS 1007 record. I'm trying to figure out how plotting a frequency works, but i am truly confused by this. I tried using SJPlot online but it doesn't offer the Clearaudio LP as a setting and every plot I create looks totally off by me. like -13db at 10k, -18 at 20k ???
That said, I have to look into my cart alignment I guess because there is a lot of harmonic distortion on the left channel, sweep, not on the right. Or maybe it's the record. No idea.
I have uploaded both sweeps (left & right, summed to dual-channel mono each) declicked at 44.1khz, 16bit. Could someone plot this?:
mega.nz
I would love to correct my setup to flat (using iZotope RX10 & Voxengo CurveEQ)
My gear:
TT:
Technics SL 1210 GR2
Cart:
Shure V15 IV with Jico SAS/B Stylus
Pre-Amp:
Musical Fidelity V90-LPS
Capture:
EVGA NuAudio at 192khz, 32bit using Nero Wave Editor
Also:
Man this record is crackly sounding for a new sealed copy. Jeez
That said, I have to look into my cart alignment I guess because there is a lot of harmonic distortion on the left channel, sweep, not on the right. Or maybe it's the record. No idea.
I have uploaded both sweeps (left & right, summed to dual-channel mono each) declicked at 44.1khz, 16bit. Could someone plot this?:
10.7 MB file on MEGA
I would love to correct my setup to flat (using iZotope RX10 & Voxengo CurveEQ)
My gear:
TT:
Technics SL 1210 GR2
Cart:
Shure V15 IV with Jico SAS/B Stylus
Pre-Amp:
Musical Fidelity V90-LPS
Capture:
EVGA NuAudio at 192khz, 32bit using Nero Wave Editor
Also:
Man this record is crackly sounding for a new sealed copy. Jeez
Oh sorry, I didn't mean "summed", but for example the left channel sweep file is the original left channel on both channels of the file. I guess I could have saved that as a mono file in the first place, but I didn't think of that.
Ok, I thought that meant the old JVC TRS-1007 Record.
But anyway, my plots end up looking like there is a massive drop in trebble.
Like "Huh?" ~ -37dB at 20khz ???
It's near flat when I select "Inverse RIAA - Trebble only" but that isn't the correct setting or is it?
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Phono Cartridge Response Measurement Script
This thread is intended to consolidate the technical discussion and further development of Scott Wurcer's frequency response measurement script to a central area. I'd like to keep this discussion about the tool rather than specific cartridges. Measurement Library thread is here. Usage info is...
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Use standard mode and give it one file of both sweeps as described in the linked post. If you recorded it using a phono stage that has RIAA, then select "with RIAA". That's it.
ElectricWarrior
Member
It is a universal method that works for any arm—IF the slots in the headshell are long enough. This could be a problem here. Most generic protractors are for Baerwald/IEC, which needs a considerably longer overhang than the stock geometry for your tonearm.
Right, the two point method lacks accuracy. I noticed I can be several millimeters off and it may still look fine on the null point grids.
The accuracy by which the angle of the cartridge or cantilever can be seen is very limited. This is a problem for any protractor, but with a two point type an angular error is used to find the overhang, so the accuracy by which the overhang can be determined is limited as well.
The arc sure makes overhang errors very easily visible. But I found I can get a similar degree of accuracy with a llnear offset protractor. As long as the protractor has a second null point grid for double checking, you can't do worse than with a two point type.
Post moved to the thread "Fun with vinyl measurements".
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Fun with vinyl measurements
Is there any special setting in the script when you use music tracks? I mean there is no 1 kHz track here. At top if the script You have the options Peak to be used with a single tone, Sweep for sweep, and broadband for pink noise/music. Use at own risk;)
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If I use EQ to correct my system, is it a bad idea to do this for each channel individually? they are not the exact same, that's why i'd do it.
But now i've read somewhere that using different EQ for each channel can result in "smearing of the stereo image" ???
But now i've read somewhere that using different EQ for each channel can result in "smearing of the stereo image" ???
Balle Clorin
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Are you talking about corrections to cartridge differences L and right or , speakers room corrections.
I have DSP room correction ( Trinnov) and it manipulates each channel individually. But the standard to correct acoustics is to do bass only ( below 200 500 or 1000 hz depending on room) correction above 1000-2000 hz is more speaker correction due to more direct sound..
Altering the high range can make strange effects depending in speaker directivity and room reflections.
So putting EQ on a room response to affect cartridge difference may work or may not. Try and see what you like - getting equal signal to the L a d R speaker should be a good start , especially if the channels are not unbalanced within 0.3db
I can use Trinnov or Parks Audio Puffin to flatten the MC Peak or other imperfections ,- as you did in earlier post-, it works fine , but I do not hear much above 10k anyway..
I have DSP room correction ( Trinnov) and it manipulates each channel individually. But the standard to correct acoustics is to do bass only ( below 200 500 or 1000 hz depending on room) correction above 1000-2000 hz is more speaker correction due to more direct sound..
Altering the high range can make strange effects depending in speaker directivity and room reflections.
So putting EQ on a room response to affect cartridge difference may work or may not. Try and see what you like - getting equal signal to the L a d R speaker should be a good start , especially if the channels are not unbalanced within 0.3db
I can use Trinnov or Parks Audio Puffin to flatten the MC Peak or other imperfections ,- as you did in earlier post-, it works fine , but I do not hear much above 10k anyway..
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Cartdrige differences
Also: Linear Phase EQ or Minimum Phase? I suppose using different EQs with minimum phase would result in phase discrepancies when recording a mono record in stereo and then summing it down. Or am I wrong? Linear Phase could result in pre-ringing, but I am not doing anything major in terms of EQ. hmm
Also: Linear Phase EQ or Minimum Phase? I suppose using different EQs with minimum phase would result in phase discrepancies when recording a mono record in stereo and then summing it down. Or am I wrong? Linear Phase could result in pre-ringing, but I am not doing anything major in terms of EQ. hmm
aaaakkkk
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SFC-TR100 vs CA-TRS1007, Denon XG-7001, Denon XL-7001, Ortofon-TR
cartridge - Karat DV, retipped, 2.5mm cantilever + ML Stylus
cartridge - Karat DV, retipped, 2.5mm cantilever + ML Stylus
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Nice. Could you add also Ortofon test record with the correction of its error? Using the below formula twice in the Nyquist prompt of Audacity.
(biquad-m *track* 9.08612614639649000E-01 -5.22931473883012000E-01 -3.44913691685509000E-01 1.00000000000000000E+00 -6.04500910000000000E-01 -3.90945930000000000E-01)
Balle Clorin
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How do you get the 15k vertical line to show?, good retipper it Seems
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aaaakkkk
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ax.set_xticks([0,20,50,100,500,1000,5000,10000,15000,20000,50000,100000])How do you get the 15k vertical line to show?, good retipper it Seems
ax.set_xticklabels(['0','20','50','100','500','1k','5k','10k','15k','20k','50k','100k'])
I know next to nothing about programming, and I found this line. 15k is important to me because anything higher is usually irrelevant, and very few people even hear anything higher than 15k.
Did you apply the function twice in a row on the same file?
Phono Cartridge Response Measurement Script
So you've seen this statement directly from Jico? Where? Sorry, no. I believe soundsmith (Peter Ledermann) said that somewhere on his site. But again also not with info how to measure etc, so not really useful info. But the point I tried to make is that when trying to research distortion in...
www.audiosciencereview.com
aaaakkkk
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Now I applied it twice and applied an FFT filter up to 400Hz.Did you apply the function twice in a row on the same file?
Phono Cartridge Response Measurement Script
So you've seen this statement directly from Jico? Where? Sorry, no. I believe soundsmith (Peter Ledermann) said that somewhere on his site. But again also not with info how to measure etc, so not really useful info. But the point I tried to make is that when trying to research distortion in...
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Thanks, looking better. The EQ formula is a RIAA correction, and the error with the Ortofon is that the time constants were not correct when it was cut in half-speed. I just found using that RIAA correction twice seems to correct it and align almost perfectly with the CA-TRS1007 in the frequency range of 800 Hz - 20 0000 Hz.
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