I believe (but could be wrong) that's only true for western music, tuned to 440hz as an "A" with 12 steps between octaves. Eastern music for example, with stringed instruments without frets, like Sitar for example, sounds very different and I believe its because they don't follow that practice. Highlighting that was my intent between linking a particular piece of music thats well outside the mainstream top 40. (alternatively, consider my tone-deaf self in middle school trying to tune my euphonium by adjusting the slide randomly and pretending i could hear a difference)