The foundation of all western music is the Octave musical scale but it’s not well understood

The octave system started with observations by Pythagoras c. 570 — c. 495 BC, a Greek philosopher. Pythagoras studied the ancient stringed instrument, the lyre. He discovered two strings of the same diameter, the same length and the same tension sound the same. This is called consonant. In most cases, if two strings with different diameters, and/or different lengths and/or a different tension, make a sound that is dissonant or sounds bad to the ear. Occasionally, two strings with different tones tuned at certain interval will not sound bad but will sound good…