Aren't they per 1/3 octave?The used tones are not harmonics from each other so have no phase relation.
If they are, they are pretty much harmonics...
I guess @amirm is doing something similar than for the 7 tones tests, as he explains here:
https://www.audiosciencereview.com/...-of-hifiberry-dac-pro.8555/page-2#post-217754
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