Dunno how accurate this is because I’m not a musician, but pretty cool

The discovery and refinement of pi was a result of a collaboration over centuries from the Babylonians, to Archimedes, to Tsu Chung-Chi, to Leonardo … on through today

Why do you need pi? You can use pi to find the area of a circle … π r ² … 3.14 times the radius squared.

7 Numbers That Are Just as Cool as Pi. From the number one, to Euler’s Number, to Tau, and Phi (the golden ratio)