The Harmonic Seventh Chord

John Carlos Baez

Wed Jan 10 2024

Traditional western music theory embraces chords with frequency ratios that are products of powers of 2, 3, and 5… but not higher primes. Barbershop quartets go further!

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This is a companion discussion topic for the original entry at https://johncarlosbaez.wordpress.com/2024/01/10/the-harmonic-seventh-chord/