Frequency Response Test Records

[Thomas_A]

If those are “my” coefficients it’s not a double filter, rather shifted constants.

Sorry will edit. i thought it was called double and not squared half FIAA which I used first.

 

[JP]

Probably. “Doubled” as in doubled constants.

 

[Thomas_A]

Probably. “Doubled” as in doubled constants.

Edited!

 

[Thomas_A]

This is 100% a MicroLine stylus. Do any other diamonds even have this kind of shape? However, this MicroLine isn't perfectly symmetrical: its edges have different lengths and thicknesses, and I think the angles of the edges are different too. And I still don't understand why the crosstalk is so poor, only 25 dB. Maybe this record was cut with an SRA of 15 degrees or less."

The same stylus had better crosstalk with the Ortofon record I presume? VTA has an effect but it is rather small. Tracking force as well. Records may have been cut with not perfect 45/45 degree cutters and there may be a twist of the cantilever as the force acts the tip. This shifts the crosstalk. Only very tiny suspension stiffness will give differences in the twisting action.

 

[Balle Clorin]

Just collecting some crosstalk data here. Some data set was with using Ortofon record for Azimuth, others using Toshiba LF 9001R, apologize for the mess. The point is that crosstalk vary A lot between records, my Toshiba LF-9001R is infact close to the median of all my data, some adjustments may have been made between the data sets.
Set Azimuth per Ortofon

Set Azimuth by Toshiba

EDIT:Wrong thread, to lazy to move

 

[Balle Clorin]

By the way I emailed with XXX this week and is seems like they may consider to issue a new test record sometime in 2027. I shared some wishes for test tracks.

I think I can just about find room for 1 or 2 more test records..

 

[aaaakkkk]

It was interesting: a test record cut via DMM at half-speed. and a sweep tone recorded with RIAA equalization.

 

[sqrl]

Just collecting some crosstalk data here. Some data set was with using Ortofon record for Azimuth, others using Toshiba LF 9001R, apologize for the mess. The point is that crosstalk vary A lot between records, my Toshiba LF-9001R is infact close to the median of all my data, some adjustments may have been made between the data sets.
Set Azimuth per Ortofon
View attachment 531788

Set Azimuth by Toshiba
View attachment 531789

View attachment 531791
View attachment 531792


EDIT:Wrong thread, to lazy to move

That's a huge amount of data to collect, thanks. How did you extract the values for the 1 kHz tones, apart from the HP filter?

 

[Balle Clorin]

Two ways, they give the same result.
1. Record to CoolEdit Pro , flat eq , high pass 400hz, analyse file level /statistics average level. De click.
2. Parks Audio Puffin Azimuth function which also use 400hz high pass , record flat EQ.

 

[melloncolliecat]

Impressive collection of test records! Thanks for sharing the results! @Balle Clorin Which track/tracks are you using for azimuth on the Toshiba record?

 

[Balle Clorin]

400hz L and R crosstalk

 

[Thomas_A]

Test record DIN 45 541, 1971. A record that later was replaced by DIN 45 543. According to Yosh site the DIN 45 543 adopted a new standard and 23° VMA, so I guess the DIN 45 541 had the older standard. This record was not the one I ordered (it was the DIN 45 542), but I anyway put the results of the sweeps here. They are divided into two 30 Hz-1000 Hz and 1000 Hz- 20 000 Hz. The record contains also spot frequencies and some others.

I should also note that the loading is not aimed for linear response in the top - I add the CA-TRS1007 for comparison.

All in all, not a recommended one to get and its split sweep is not ideal.The spot frequencies can be useful in some cases and it also has a 10 kHz signal at the end of record.

CA-TRS1007:

 

[sqrl]

DIN 45 451 and 452 are cut at 15° on the 1969 version, using the TELDEC tracing simulator. "As a result, the geometric distortion products when measuring a pickup with a VTA of 15°, a HTA of 0° and a stylus tip radius of 12 microns can be ignored".

 

[Thomas_A]

DIN 45 451 and 452 are cut at 15° on the 1969 version.

Ok, thanks. All test records should come with details of cutting parameters, IMO.