Earlier quoted context omitted.
To confirm the claim that "all scales in all cultures are based on octaves and fifths" one might study the scales.zip scale files and find those that do not contain octaves and fifths, which should naturally be zero if the claim is true. https://www.huygens-fokker.org/scala/ Note also that certain musical traditions were suppressed or eradicated due to their unfortunate habit of using dissonant notes such as minor se…
The 12 tone scale is a natural property of the world that has been independently discovered by many different cultures across the world. The microtonalities or strange scales (like gamelan) are evolutions of the natural octave/fifths grid. Every synthesizer has a "detune" knob.
What is your source for this opinion?
Gamelan predates the Hindu-Buddhist culture that dominated Indonesia in its earliest records and thus represents an indigenous art form of Indonesia
~ https://en.wikipedia.org/wiki/GamelanHow do you know anything that comes prior to recorded history?