Full Idea
Pythagoras discovered the numerical relation of sounds on a string.
Gist of Idea
Pythagoras discovered the numerical relation of sounds on a string
Source
report of Pythagoras (reports [c.530 BCE]) by Diogenes Laertius - Lives of Eminent Philosophers 08.1.11
Book Reference
Diogenes Laertius: 'Diogenes Laertius', ed/tr. Yonge,C.D. [Henry G. Bohn 1853], p.343