The Harmonic Seventh Chord
Azimuth 2024-01-10
Summary:
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! These quartets love four-part harmony using dominant seventh chords. A ‘dominant seventh chord’ contains a note, its major third, its perfect fifth, and its minor seventh. In traditional […]