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Script for intermodulation distortion testing of vinyl playback, setting VTA ,Zenith etc by test record

Thanks.
I have the STR-112, it has duotones with 4kHz and 400Hz lateral and vertical, and 200 Hz lateral and vertical, all with different levels of the intermodulation.
I think the results from such a test can only be compared to tests with the same record.
Anyway, the vertical intermodulations would be interesting to optimize VTA/SRA.
 
using the script...IMD results from the DIN 45 452 VTA test record, f1+f2=1000hz track mat maximum VTA...with mat.
Quite close to the specified 23degree

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Tacet test record Antiskating/tracking test, script attached ,rename .txt to .py and edit file to match your recording

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and with the analogmagik tracking track
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And Ortofon 50-60-70-80-90-100um track
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L-R phase difference for fun
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note recording levels may not be exactly the same, these are old files I had, but all is with the same MC cartridge and TT /arm
 

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using, a IMD vs time script... on CBS STR-112 test record, Sadly none of the track fit the 120mm null point. The numbers seem high, maybe because i recorded without RIAA
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The vertical IMD track reacts with higher distortion when rising the tonearm base 2.5mm

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