The ancient system of Pythagorean tuning is based on the interval of a perfect fifth. My other videos on tuning systems: Equal temperament https://www.youtube.com/watch?v=FWN0JJGQyvk Pythagorean comma https://www.youtube.com/watch?v=ZJhhQw607As The overtone series https://www.youtube.com/watch?v=wzk5WPUtUH0 My other videos on music theory: Circle of fifths https://www.youtube.com/watch?v=WeonyENDcYM Consonance and dissonance https://www.youtube.com/watch?v=PropSXeaLt0 Intervals https://www.youtube.com/watch?v=BHzBwDTZTb8 Major and minor chords https://www.youtube.com/watch?v=jyUSY1Z4I5I Extended chords https://www.youtube.com/watch?v=yr-YCr0Ky0Y Added tone chords https://www.youtube.com/watch?v=pbI72zYWpX4 The Devil in music (the tritone) https://www.youtube.com/watch?v=avks7eTTm0c Musical modes: What are they? https://www.youtube.com/watch?v=JGsidU8gjQQ Making music with modes https://www.youtube.com/watch?v=duwpfqof4Cw My other videos on music: The Harmony of the Spheres https://www.youtube.com/watch?v=ZtiTSJQLEkQ Music and the Muse https://www.youtube.com/watch?v=fZBKpr0bihU Elgar’s Enigmas https://www.youtube.com/watch?v=-r3wpf5zuvA Holst and The Planets https://www.youtube.com/watch?v=n5Ck-NZdnF4 Einstein and His Music https://www.youtube.com/watch?v=dVCnpQu_Fu4 Did Did the Beatles Play Out of Tune? https://www.youtube.com/watch?v=-GPgaMmft88 My website: https://www.daviddarling.info/ My science and music channel: null