The circle of fifths is an essential music theory tool that illustrates the relationships between the 12 notes of the chromatic scale, their key signatures, and the corresponding major and minor keys. This interactive version of the circle of fifths goes a step further by allowing you to explore each key's note positions on a virtual ukulele fretboard. Simply click on a key name within the circle, and the fretboard will update to display the relevant notes and provide information about the chords within that key, also known as the chord family.
Understanding these chord families is incredibly useful for jamming, learning songs you enjoy, and composing your own music. Many pop and rock songs rely on chord progressions that use only three or four chords from a specific chord family. Among the most popular is the I-V-vi-IV progression (also known as 1-5-6-4), which consists of three major chords and the sixth chord of the family. This iconic progression is so widely used that it even has its own Wikipedia page, which features more than 200 songs built around it.