alt Hacker News> 1.5*12 is about 129.74,
Math checks out.
> So yes, the 12-tone scale is a universal thing -
I don't follow the logic here though. It's certainly true that a 12-tone / Chromatic scale is ubiquitous within the Western Music tradition .. but the universe is reportedly a little larger.
Even Western Music includes exceptions like the 9-note augmented scale, though the argument can be made that it's a 12-scale with 3 bits "missing" - not a case that can be made about a non-western 7 note percussive scale.
All scales in all cultures are based on octaves and fifths. (E.g., the ancient Chinese musical scale also has 12 tones.)
Also the so-called "Western music" standardized on 12 tones very late in the process, long after the Chinese figured it out.
> a 12-scale with 3 bits "missing"
That's all scales, even the "non-Western" ones. Microtonality is added to the standard 12 tone to add tone effects. (Synthesizers in pop music do the same trick.)