The grand standard of harmonical relation among the Pythagoreans was the musical octave.
Draper, John William, History of the Intellectual Develop...(2010)
The musical octave was their best example to illustrate their meaning.
Blackmar, Frank W. (Frank Wilson), History of Human Society(2010)
Thou art the note called Gandhara in the musical octave.
Ganguli, Kisari Mohan, The Mahabharata of Krishna-Dwaipaya...(2010)