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Two main problems with previous article:

• Most people really are the same, regardless of anything. This is a meaningless finding. The minorities or abberations are what are interesting. The effect described is not true for all languages or cultures, or types of music.
• Modern temperance, which imposes an artificial equality between the tones has been adopted for most non-world/folk music for long enough that it’s effect on speech is likely greater than the other way around. These tones have been presented as “natural”, and people are likely to be imitating them more than the tones are imitating speech. They’ve been matematically rounded off for the sake of convience in tuning.