Thank you, I am somewhat aware of the knobs present on a synth, though fail to see the relevance given that various other instruments do not have dynamic retuning options. Which 12 tone scale did you have in mind (for there are many) and why do you think 12 (for there are many other numbers, some of which are used by various scale systems) is a natural property of the world? Perhaps with a more cogent argument you could make a better case for your opinion.

> microtonalities or strange scales (like gamelan) are evolutions of the natural octave/fifths grid.

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

How do you know anything that comes prior to recorded history?