This spiral is a map of the harmonic sequence. That's how music works, or rather, how everything works. It is a visual representation of musical intervals and their relationships, in the context of a harmonic or tuning system. In the middle of the diagram is the root note, with frequencies doubling for each octave. Each interval is also associated with a specific mathematical ratio, first calculated by Pythagoras. He discovered that two notes forming an interval always had a ratio of 2 to 1. The ratio of the perfect fifth is 3 to 2, and the perfect fourth is 4 to 3. Pythagoras combined these intervals and then created other notes to compose the major. With his mathematical calculation, the theory of music was born. All frequencies, be they sound, light, planetary motion, etc., can be related to these cycles. The same spiral pattern appears everywhere in nature, in our DNA, in plants, in galaxies, in weather patterns... and so also in music.
Information Technology Consultant / Aerospace Industry
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