OK, I also was referring to the repository, but you said 'Why aren't your "perfect" test tones...'. The only perfect ones are in the "perfect" folder, so you can see how I assumed you were referring to those. I don't think he claims any non-3-4-6-ratio to be "perfect".We are talking about different signals. I wasn't referring to the ratio files, but to the output produced by waveutil in the "PerfectSineWaves" repository linked in the post I quoted. It truncates to the selected sample format without dither and with no option to apply dither, hence the quantisation artefacts shown in the RTA. From my point of view they are not useable as test signals.
He does claim his utility is "The most accurate sine wave generation utility available", and that, of course, is another matter. So I suppose it's problematic to begin with to refer to a repository as "PerfectSineWaves", which includes perfect sine ave and the ability to create them, along with the ability to create imperfect test tones.
And as a nit-picky aside, the claim of the repository is, "Perfect and bit-perfect PCM encoded sine wave audio test tones". I'll accept that it can create perfect PCM encoded sine waves, within strict limitations, but "bit-perfect" is a term normally used for processes, and doesn't fit this data-accuracy context. "Bit-perfect" doesn't mean "error-free". For instance, bit-perfect is often used to describe digital music playback, even though music is never encoded error-free.