> The octave is a doubling/halving of frequencies Side note: Except when in praxis you have to accord for non-perfect masses, then you have to stretch the tuni

> The octave is a doubling/halving of frequencies Side note: Except when in praxis you have to accord for non-perfect masses, then you have to stretch the tuning. https://en.wikipedia.org/wiki/Stretched_tuning https://en.wikipedia.org/wiki/Stretched_tuning