You'd hope the musicology would be able to provide some answers by looking at musical cultures that do not use western tuning systems (particularly 12TET), but as best as I can tell, the results from such comparisons just muddy the waters even further.
https://sonuscore.com/guests/manuals/Free_Orchestra_Chords_M...
If you read that license, you'll notice that the featured website does not appear to really comply with the license of the samples they're using. Like most sample banks licences, it specifically disallows redistributing the raw samples. That is, unless they got a special license.
https://www.facebook.com/Sonuscore/posts/check-out-the-onlin...
